- Set NullValueHandling to NullValueHandling.Ignore, so that null values are not serialized
- If .NET primitive types (like bool or long) are optional, use nulltable types, so that they can be ignored when serializing

If the C# enum name does not match the JSON value, add an EnumMember attribute to ensure the mapping is done properly

Use a custom contract resolver in the CommandResposeFactory, to ensure that properties with private setters have their values set, too.