Fixed the patch endpoint.

src/Squidex.Domain.Apps.Entities/Contents/ContentDomainObject.cs

@@ -67,7 +67,7 @@ namespace Squidex.Domain.Apps.Entities.Contents
         {
             VerifyCreatedAndNotDeleted();
 
-            var newData = State.Data.MergeInto(command.Data);
+            var newData = command.Data.MergeInto(State.Data);
 
             if (!newData.Equals(State.Data))
             {

src/Squidex/Areas/Api/Controllers/Content/Generator/SchemaSwaggerGenerator.cs

@@ -174,7 +174,7 @@ namespace Squidex.Areas.Api.Controllers.Contents.Generator
                 operation.Summary = $"Patchs a {schemaName} content.";
                 operation.Security = EditorSecurity;
 
-                operation.AddBodyParameter("data", contentSchema, SchemaBodyDescription);
+                operation.AddBodyParameter("data", dataSchema, SchemaBodyDescription);
 
                 operation.AddResponse("201", $"{schemaName} item patched.", dataSchema);
             });