diff --git a/E2ETests/SenderTest.cs b/E2ETests/SenderTest.cs
index 2f6be8761a5325fe4ef693c0fbd06b09ad99cacb..89e24617b2312435da908c105953782d2d33dfa1 100644
--- a/E2ETests/SenderTest.cs
+++ b/E2ETests/SenderTest.cs
@@ -85,7 +85,7 @@ public class SenderTest {
         // Arrange
         var dut = _fluentSender
             .WithDestination(desitnationId)
-            .WithServiceType("ServcieName", "urn:de:fim:leika:leistung:99400048079000");
+            .WithServiceType("ServiceName", "urn:de:fim:leika:leistung:99400048079000");
 
         var attachments = new List<Attachment>();
         for (var i = 0; i < 10; i++) {
diff --git a/Encryption/JoseEncryptor.cs b/Encryption/JoseEncryptor.cs
index 8d4d7adcdee978788cfcba912d1dccd853df3bcd..c930cd2c02c8885877a26075013b4c1174e63b77 100644
--- a/Encryption/JoseEncryptor.cs
+++ b/Encryption/JoseEncryptor.cs
@@ -7,6 +7,9 @@ public class JoseEncryptor : IEncryptor {
     private const JweCompression Compression = JweCompression.DEF;
     private const JweAlgorithm Algorithm = JweAlgorithm.RSA_OAEP;
 
+    private const string ErrorMessage =
+        "On macOS add DYLD_LIBRARY_PATH to your environment variables. Look at the README for more information.";
+
     private (string plainText, byte[] plainBytes, byte[] tag) Decrypt(Jwk key, string payload) {
         var result = JWE.Decrypt(payload, key);
 
@@ -15,21 +18,36 @@ public class JoseEncryptor : IEncryptor {
 
 
     public (string plainText, byte[] plainBytes, byte[] tag) Decrypt(string key, string cipher) {
-        var jwk = Jwk.FromJson(key, new Jose.JsonMapper());
-        return Decrypt(jwk, cipher);
+        try {
+            var jwk = Jwk.FromJson(key, new Jose.JsonMapper());
+            return Decrypt(jwk, cipher);
+        }
+        catch (PlatformNotSupportedException e) {
+            throw new PlatformNotSupportedException(ErrorMessage, e);
+        }
     }
 
     public string Encrypt(string key, string plain) {
-        var jwk = Jwk.FromJson(key, new Jose.JsonMapper());
-        return JWE.Encrypt(plain,
-            new JweRecipient[] { new JweRecipient(Algorithm, jwk) },
-            Encryption, compression: Compression);
+        try {
+            var jwk = Jwk.FromJson(key, new Jose.JsonMapper());
+            return JWE.Encrypt(plain,
+                new JweRecipient[] { new JweRecipient(Algorithm, jwk) },
+                Encryption, compression: Compression);
+        }
+        catch (PlatformNotSupportedException e) {
+            throw new PlatformNotSupportedException(ErrorMessage, e);
+        }
     }
 
     public string Encrypt(string key, byte[] plain) {
-        var jwk = Jwk.FromJson(key, new Jose.JsonMapper());
-        return JWE.EncryptBytes(plain,
-            new JweRecipient[] { new JweRecipient(Algorithm, jwk) },
-            Encryption, compression: Compression);
+        try {
+            var jwk = Jwk.FromJson(key, new Jose.JsonMapper());
+            return JWE.EncryptBytes(plain,
+                new JweRecipient[] { new JweRecipient(Algorithm, jwk) },
+                Encryption, compression: Compression);
+        }
+        catch (PlatformNotSupportedException e) {
+            throw new PlatformNotSupportedException(ErrorMessage, e);
+        }
     }
 }
diff --git a/FitConnect/FluentSender.cs b/FitConnect/FluentSender.cs
index 5f31286773054f179c9c2af9c94c049dd8fad5f0..7b0eeaaf0b1033d23ec6f2a9af800db9faeb8eff 100644
--- a/FitConnect/FluentSender.cs
+++ b/FitConnect/FluentSender.cs
@@ -38,9 +38,9 @@ public class FluentSender : Sender, IFluentSender, IFluentSenderWithDestination,
         routeService, destinationService, logger) {
     }
 
-    public string PublicKey { get; set; }
+    public string? PublicKey { get; set; }
     public CreateSubmissionDto? NewSubmission { get; set; }
-    public Submission Submission { get; set; }
+    public Submission? Submission { get; set; }
 
 
     public IFluentSenderWithDestination FindDestinationId(string leiaKey, string? ags, string? ars,
diff --git a/FitConnect/Models/Destination.cs b/FitConnect/Models/Destination.cs
index fe73e08aa441ed499c07cc121caa587e3109fef5..7230666d2695cb586c0e39d804a357564872e304 100644
--- a/FitConnect/Models/Destination.cs
+++ b/FitConnect/Models/Destination.cs
@@ -1,11 +1,11 @@
 namespace FitConnect.Models;
 
 public class Destination {
-    public string LeikaKey { get; set; }
+    public string? LeikaKey { get; set; }
     public string? Ags { get; set; }
     public string? Ars { get; set; }
     public string? AreaId { get; set; }
-    public string DestinationId { get; set; }
+    public string? DestinationId { get; set; }
 
     public bool Valid => !((string.IsNullOrWhiteSpace(Ags)
                             && string.IsNullOrWhiteSpace(Ars)
diff --git a/FitConnect/Models/Submission.cs b/FitConnect/Models/Submission.cs
index 6917a36fe561bcfc789780726ae292213b798858..638397fec38d446f0542d2e1ca5065005e0164d1 100644
--- a/FitConnect/Models/Submission.cs
+++ b/FitConnect/Models/Submission.cs
@@ -4,9 +4,9 @@ using FitConnect.Services.Models.v1;
 namespace FitConnect.Models;
 
 public class Submission {
-    public string Id { get; set; }
+    public string? Id { get; set; }
     public string? CaseId { get; set; }
-    public Destination Destination { get; set; } = new();
+    public Destination? Destination { get; set; } = new();
 
     public string DestinationId {
         get => Destination.DestinationId;
diff --git a/Services/Models/CallbackDto.cs b/Services/Models/CallbackDto.cs
index 2a2e45adfbdf83955c5c784b972d4786f80783c3..0228e1f89d81fb88a94ded3a2d5f45f55f8789f0 100644
--- a/Services/Models/CallbackDto.cs
+++ b/Services/Models/CallbackDto.cs
@@ -4,7 +4,7 @@ namespace FitConnect.Services.Models;
 
 public class CallbackDto {
     [JsonPropertyName("url")]
-    public string Url { get; set; }
+    public string? Url { get; set; }
 
     [JsonPropertyName("secret")]
     public string? Secret { get; set; }
diff --git a/Services/Models/OAuthAccessToken.cs b/Services/Models/OAuthAccessToken.cs
index 3fc70d9b9c1063c2df508e3accbd4756e85939e4..57b9ac9e916f330ad990e3d319ca1320387263ef 100644
--- a/Services/Models/OAuthAccessToken.cs
+++ b/Services/Models/OAuthAccessToken.cs
@@ -4,13 +4,13 @@ namespace FitConnect.Services.Models;
 
 public class OAuthAccessToken {
     [JsonPropertyName("access_token")]
-    public string AccessToken { get; set; }
+    public string? AccessToken { get; set; }
 
     [JsonPropertyName("scope")]
-    public string Scope { get; set; }
+    public string? Scope { get; set; }
 
     [JsonPropertyName("token_type")]
-    public string TokenType { get; set; }
+    public string? TokenType { get; set; }
 
     [JsonPropertyName("expires_in")]
     public int ExpiresIn { get; set; }
diff --git a/Services/Models/v1/Case/EventLogDto.cs b/Services/Models/v1/Case/EventLogDto.cs
index 54598c77b3ef2ca51c05ab3b70415e9c2e814788..6e40e32a6c35dc07330380daae72d45f02d2a597 100644
--- a/Services/Models/v1/Case/EventLogDto.cs
+++ b/Services/Models/v1/Case/EventLogDto.cs
@@ -4,14 +4,14 @@ namespace FitConnect.Services.Models.v1;
 
 public class EventLogDto {
     [JsonPropertyName("count")]
-    public int Count;
+    public int Count{ get; set; }
 
     [JsonPropertyName("eventLog")]
-    public List<string> EventLog;
+    public List<string>? EventLog{ get; set; }
 
     [JsonPropertyName("offset")]
-    public int Offset;
+    public int Offset{ get; set; }
 
     [JsonPropertyName("totalCount")]
-    public long TotalCount;
+    public long TotalCount{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/ContactInformationDto.cs b/Services/Models/v1/Destination/ContactInformationDto.cs
index cb65d109388f8002bb6be72c5f9526ece5246869..c715f6adbbe3b7a0ac98f3153bea4a6cf772d675 100644
--- a/Services/Models/v1/Destination/ContactInformationDto.cs
+++ b/Services/Models/v1/Destination/ContactInformationDto.cs
@@ -4,17 +4,17 @@ namespace FitConnect.Services.Models.v1;
 
 public class ContactInformationDto {
     [JsonPropertyName("address")]
-    public string Address;
+    public string? Address{ get; set; }
 
     [JsonPropertyName("email")]
-    public string Email;
+    public string? Email{ get; set; }
 
     [JsonPropertyName("legalName")]
-    public string LegalName;
+    public string? LegalName{ get; set; }
 
     [JsonPropertyName("phone")]
-    public string Phone;
+    public string? Phone{ get; set; }
 
     [JsonPropertyName("unit")]
-    public string Unit;
+    public string? Unit{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/CreateDestinationDto.cs b/Services/Models/v1/Destination/CreateDestinationDto.cs
index 984fb40e18cb2193e93531b7e7a04b40cb5ce44b..8f731baf06d481c905dfce06daed7f650235c3f9 100644
--- a/Services/Models/v1/Destination/CreateDestinationDto.cs
+++ b/Services/Models/v1/Destination/CreateDestinationDto.cs
@@ -4,32 +4,32 @@ namespace FitConnect.Services.Models.v1;
 
 public class CreateDestinationDto {
     [JsonPropertyName("callback")]
-    public CallbackDto Callback;
+    public CallbackDto? Callback { get; set; }
 
     [JsonPropertyName("contactInformation")]
-    public ContactInformationDto ContactInformation;
+    public ContactInformationDto? ContactInformation { get; set; }
 
 
     [JsonPropertyName("encryptionKid")]
-    public string EncryptionKid;
+    public string? EncryptionKid { get; set; }
 
 
     [JsonPropertyName("encryptionPublicKey")]
-    public string EncryptionPublicKey;
+    public string? EncryptionPublicKey { get; set; }
 
 
     [JsonPropertyName("metadataVersions")]
-    public List<string> metadataVersions;
+    public List<string>? MetadataVersions { get; set; }
 
 
     [JsonPropertyName("replyChannels")]
-    public DestinationReplyChannelsDto ReplyChannels;
+    public DestinationReplyChannelsDto? ReplyChannels { get; set; }
 
 
     [JsonPropertyName("services")]
-    public List<DestinationServiceDto> Services;
+    public List<DestinationServiceDto>? Services { get; set; }
 
 
     [JsonPropertyName("signingPublicKey")]
-    public string SigningPublicKey;
+    public string? SigningPublicKey { get; set; }
 }
diff --git a/Services/Models/v1/Destination/DestinationListDto.cs b/Services/Models/v1/Destination/DestinationListDto.cs
index e90eeca4d167a56ccaa79eb1e516b9bfe077689c..ce9324b8a5b4ddbb6ad2928c66d8b4aef87e9a4e 100644
--- a/Services/Models/v1/Destination/DestinationListDto.cs
+++ b/Services/Models/v1/Destination/DestinationListDto.cs
@@ -4,17 +4,17 @@ namespace FitConnect.Services.Models.v1;
 
 public class DestinationListDto {
     [JsonPropertyName("count")]
-    public int Count;
+    public int Count{ get; set; }
 
 
     [JsonPropertyName("destinations")]
-    public List<PrivateDestinationDto> Destinations;
+    public List<PrivateDestinationDto>? Destinations{ get; set; }
 
 
     [JsonPropertyName("offset")]
-    public int Offset;
+    public int Offset{ get; set; }
 
 
     [JsonPropertyName("totalCount")]
-    public long TotalCount;
+    public long TotalCount{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/DestinationServiceDto.cs b/Services/Models/v1/Destination/DestinationServiceDto.cs
index 9bb36958dc67c86c3d8d83405ede7a56c6b69052..bb79fda5abbf22b1c035c69b4e3190c1da7911d8 100644
--- a/Services/Models/v1/Destination/DestinationServiceDto.cs
+++ b/Services/Models/v1/Destination/DestinationServiceDto.cs
@@ -4,12 +4,12 @@ namespace FitConnect.Services.Models.v1;
 
 public class DestinationServiceDto {
     [JsonPropertyName("identifier")]
-    public string Identifier;
+    public string? Identifier{ get; set; }
 
 
     [JsonPropertyName("regions")]
-    public List<string> Regions;
+    public List<string>? Regions{ get; set; }
 
     [JsonPropertyName("submissionSchemas")]
-    public List<SubmissionSchemaDto> SubmissionSchemas;
+    public List<SubmissionSchemaDto>? SubmissionSchemas{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/PatchDestinationDto.cs b/Services/Models/v1/Destination/PatchDestinationDto.cs
index 16986f770312ea3a038fb01696070ccae86dd666..844682f280a56f253df483099313fa8d50d80b46 100644
--- a/Services/Models/v1/Destination/PatchDestinationDto.cs
+++ b/Services/Models/v1/Destination/PatchDestinationDto.cs
@@ -4,28 +4,28 @@ namespace FitConnect.Services.Models.v1;
 
 public class PatchDestinationDto {
     [JsonPropertyName("callback")]
-    public CallbackDto Callback;
+    public CallbackDto? Callback{ get; set; }
 
 
     [JsonPropertyName("contactInformation")]
-    public ContactInformationDto ContactInformation;
+    public ContactInformationDto? ContactInformation{ get; set; }
 
 
     [JsonPropertyName("encryptionKid")]
-    public string EncryptionKid;
+    public string? EncryptionKid{ get; set; }
 
 
     [JsonPropertyName("metadataVersions")]
-    public List<string> metadataVersions;
+    public List<string>? metadataVersions{ get; set; }
 
 
     [JsonPropertyName("replyChannels")]
-    public DestinationReplyChannelsDto ReplyChannels;
+    public DestinationReplyChannelsDto? ReplyChannels{ get; set; }
 
 
     [JsonPropertyName("services")]
-    public List<DestinationServiceDto> Services;
+    public List<DestinationServiceDto>? Services{ get; set; }
 
     [JsonPropertyName("status")]
-    public string Status;
+    public string? Status{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/PrivateDestinationDto.cs b/Services/Models/v1/Destination/PrivateDestinationDto.cs
index 28f5170880bd65749cca99ce9b3f368eae0f7948..e2dcc4e4cf1fd7d088fb9c00ee69f84dbee74b21 100644
--- a/Services/Models/v1/Destination/PrivateDestinationDto.cs
+++ b/Services/Models/v1/Destination/PrivateDestinationDto.cs
@@ -4,32 +4,32 @@ namespace FitConnect.Services.Models.v1;
 
 public class PrivateDestinationDto {
     [JsonPropertyName("callback")]
-    public CallbackDto Callback;
+    public CallbackDto? Callback{ get; set; }
 
 
     [JsonPropertyName("contactInformation")]
-    public ContactInformationDto ContactInformation;
+    public ContactInformationDto? ContactInformation{ get; set; }
 
     [JsonPropertyName("destinationId")]
-    public string DestinationId;
+    public string? DestinationId{ get; set; }
 
 
     [JsonPropertyName("encryptionKid")]
-    public string EncryptionKid;
+    public string? EncryptionKid{ get; set; }
 
 
     [JsonPropertyName("metadataVersions")]
-    public List<string> MetadataVersions;
+    public List<string>? MetadataVersions{ get; set; }
 
 
     [JsonPropertyName("replyChannels")]
-    public DestinationReplyChannelsDto ReplyChannels;
+    public DestinationReplyChannelsDto? ReplyChannels{ get; set; }
 
 
     [JsonPropertyName("services")]
-    public List<DestinationServiceDto> Services;
+    public List<DestinationServiceDto>? Services{ get; set; }
 
 
     [JsonPropertyName("status")]
-    public string Status;
+    public string? Status{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/SubmissionSchemaDto.cs b/Services/Models/v1/Destination/SubmissionSchemaDto.cs
index 39a509d7584614d9265174b2cadafd5786b57b0c..e44d9029ab6953901fd4bd6daba0d34b47c0a16e 100644
--- a/Services/Models/v1/Destination/SubmissionSchemaDto.cs
+++ b/Services/Models/v1/Destination/SubmissionSchemaDto.cs
@@ -8,5 +8,5 @@ public class SubmissionSchemaDto {
     public int mimeType;
 
     [JsonPropertyName("schemaUri")]
-    public string schemaUri;
+    public string? SchemaUri{ get; set; }
 }
diff --git a/Services/Models/v1/Destination/UpdateDestinationDto.cs b/Services/Models/v1/Destination/UpdateDestinationDto.cs
index ab9c5677043bd20e565daebd7dfc6dceb9dc5353..8a9d849316766e4fbe14be86e93e3ed89e0db2cb 100644
--- a/Services/Models/v1/Destination/UpdateDestinationDto.cs
+++ b/Services/Models/v1/Destination/UpdateDestinationDto.cs
@@ -4,28 +4,28 @@ namespace FitConnect.Services.Models.v1;
 
 public class UpdateDestinationDto {
     [JsonPropertyName("callback")]
-    public CallbackDto Callback;
+    public CallbackDto? Callback{ get; set; }
 
 
     [JsonPropertyName("contactInformation")]
-    public ContactInformationDto ContactInformation;
+    public ContactInformationDto? ContactInformation{ get; set; }
 
 
     [JsonPropertyName("encryptionKid")]
-    public string EncryptionKid;
+    public string? EncryptionKid{ get; set; }
 
 
     [JsonPropertyName("metadataVersions")]
-    public List<string> metadataVersions;
+    public List<string>? metadataVersions{ get; set; }
 
 
     [JsonPropertyName("replyChannels")]
-    public DestinationReplyChannelsDto ReplyChannels;
+    public DestinationReplyChannelsDto? ReplyChannels{ get; set; }
 
 
     [JsonPropertyName("services")]
-    public List<DestinationServiceDto> Services;
+    public List<DestinationServiceDto>? Services{ get; set; }
 
     [JsonPropertyName("status")]
-    public string Status;
+    public string? Status{ get; set; }
 }
diff --git a/Services/Models/v1/Submission/SubmissionCreatedDto.cs b/Services/Models/v1/Submission/SubmissionCreatedDto.cs
index 4b4ac1832848067c0bc514236fe8f525b5954d81..91da9d8639c949b7762ec2670f520a92c0f11bd4 100644
--- a/Services/Models/v1/Submission/SubmissionCreatedDto.cs
+++ b/Services/Models/v1/Submission/SubmissionCreatedDto.cs
@@ -4,11 +4,11 @@ namespace FitConnect.Services.Models.v1;
 
 public class SubmissionCreatedDto {
     [JsonPropertyName("destinationId")]
-    public string DestinationId { get; set; }
+    public string? DestinationId { get; set; }
 
     [JsonPropertyName("submissionId")]
-    public string SubmissionId { get; set; }
+    public string? SubmissionId { get; set; }
 
     [JsonPropertyName("caseId")]
-    public string CaseId { get; set; }
+    public string? CaseId { get; set; }
 }
diff --git a/Services/Models/v1/Submission/SubmissionDto.cs b/Services/Models/v1/Submission/SubmissionDto.cs
index 9430bbc53c44b03f499380f6a2d3418b4a4511f1..05a079924eccff1989c3d7230ca5cfa4643caa4b 100644
--- a/Services/Models/v1/Submission/SubmissionDto.cs
+++ b/Services/Models/v1/Submission/SubmissionDto.cs
@@ -4,32 +4,32 @@ namespace FitConnect.Services.Models.v1;
 
 public class SubmissionDto {
     [JsonPropertyName("attachments")]
-    public List<string> Attachments;
+    public List<string>? Attachments{ get; set; }
 
 
     [JsonPropertyName("callback")]
-    public CallbackDto Callback;
+    public CallbackDto? Callback{ get; set; }
 
 
     [JsonPropertyName("caseId")]
-    public string CaseId;
+    public string? CaseId{ get; set; }
 
     [JsonPropertyName("destinationId")]
-    public string DestinationId;
+    public string? DestinationId{ get; set; }
 
 
     [JsonPropertyName("encryptedData")]
-    public string EncryptedData;
+    public string? EncryptedData{ get; set; }
 
 
     [JsonPropertyName("encryptedMetadata")]
-    public string EncryptedMetadata;
+    public string? EncryptedMetadata{ get; set; }
 
 
     [JsonPropertyName("serviceType")]
-    public ServiceTypeDto ServiceType;
+    public ServiceTypeDto? ServiceType{ get; set; }
 
 
     [JsonPropertyName("submissionId")]
-    public string SubmissionId;
+    public string? SubmissionId{ get; set; }
 }
diff --git a/Services/Models/v1/Submission/SubmissionForPickupDto.cs b/Services/Models/v1/Submission/SubmissionForPickupDto.cs
index 433b898368dee5fb2f6e7970ec7b18b3cad36c64..d4fdfba358e6037553b0aa0d8b8807f6647f3d25 100644
--- a/Services/Models/v1/Submission/SubmissionForPickupDto.cs
+++ b/Services/Models/v1/Submission/SubmissionForPickupDto.cs
@@ -4,11 +4,11 @@ namespace FitConnect.Services.Models.v1;
 
 public class SubmissionForPickupDto {
     [JsonPropertyName("caseId")]
-    public string CaseId;
+    public string? CaseId{ get; set; }
 
     [JsonPropertyName("destinationId")]
-    public string DestinationId;
+    public string? DestinationId{ get; set; }
 
     [JsonPropertyName("submissionId")]
-    public string SubmissionId;
+    public string? SubmissionId{ get; set; }
 }
diff --git a/Services/Models/v1/Submission/SubmissionReducedDto.cs b/Services/Models/v1/Submission/SubmissionReducedDto.cs
index 768d3632d98983bc4407ab8c8b2656ff956f2d9e..e01f28a8f4be6f8ef8fbf4e53cbbb17084644305 100644
--- a/Services/Models/v1/Submission/SubmissionReducedDto.cs
+++ b/Services/Models/v1/Submission/SubmissionReducedDto.cs
@@ -4,24 +4,24 @@ namespace FitConnect.Services.Models.v1;
 
 public class SubmissionReducedDto {
     [JsonPropertyName("serviceType")]
-    private ServiceTypeDto _serviceTypeDto;
+    private ServiceTypeDto? ServiceTypeDto { get; set; }
 
 
     [JsonPropertyName("attachments")]
-    private List<string> Attachments;
+    private List<string>? Attachments { get; set; }
 
 
     [JsonPropertyName("callback")]
-    private CallbackDto Callback;
+    private CallbackDto? Callback { get; set; }
 
 
     [JsonPropertyName("caseId")]
-    private string CaseId;
+    private string? CaseId { get; set; }
 
     [JsonPropertyName("destinationId")]
-    private string DestinationId;
+    private string? DestinationId { get; set; }
 
 
     [JsonPropertyName("submissionId")]
-    private string SubmissionId;
+    private string? SubmissionId { get; set; }
 }
diff --git a/Services/Models/v1/Submission/SubmissionsForPickupDto.cs b/Services/Models/v1/Submission/SubmissionsForPickupDto.cs
index 564c2d8a48bcc53f74847769654d6f9e75e3f319..cd7850442df76d0c7995f0b56f34b6295acf3948 100644
--- a/Services/Models/v1/Submission/SubmissionsForPickupDto.cs
+++ b/Services/Models/v1/Submission/SubmissionsForPickupDto.cs
@@ -4,14 +4,14 @@ namespace FitConnect.Services.Models.v1;
 
 public class SubmissionsForPickupDto {
     [JsonPropertyName("count")]
-    public int Count;
+    public int Count { get; set; }
 
     [JsonPropertyName("offset")]
-    public int Offset;
+    public int Offset { get; set; }
 
     [JsonPropertyName("submissions")]
-    public List<SubmissionForPickupDto> Submissions;
+    public List<SubmissionForPickupDto>? Submissions { get; set; }
 
     [JsonPropertyName("totalCount")]
-    public long TotalCount;
+    public long TotalCount { get; set; }
 }
diff --git a/Services/Models/v1/Submission/SubmitSubmissionDto.cs b/Services/Models/v1/Submission/SubmitSubmissionDto.cs
index 14271f2ea3b7b31a28783f4e6ea541dde919cbb7..061aa637ca35b766e0ed9f6f9c318b2a5148d84d 100644
--- a/Services/Models/v1/Submission/SubmitSubmissionDto.cs
+++ b/Services/Models/v1/Submission/SubmitSubmissionDto.cs
@@ -4,8 +4,8 @@ namespace FitConnect.Services.Models.v1;
 
 public class SubmitSubmissionDto {
     [JsonPropertyName("encryptedData")]
-    public string? EncryptedData;
+    public string? EncryptedData{ get; set; }
 
     [JsonPropertyName("encryptedMetadata")]
-    public string EncryptedMetadata;
+    public string? EncryptedMetadata{ get; set; }
 }