Swapping out the standard serializer for the JSON.NET serializer is a non-issue. Code below was taken directly out of Scott Hanselman's blog

<http://www.hanselman.com/blog/OnTheNightmareThatIsJSONDatesPlusJSONNETAndASPNETWebAPI.aspx>

```
JsonSerializerSettings serializerSettings = new JsonSerializerSettings() { ReferenceLoopHandling = ReferenceLoopHandling.Ignore };
serializerSettings.Converters.Add(new IsoDateTimeConverter());
GlobalConfiguration.Configuration.Formatters[0] = new JsonNetFormatter(serializerSettings);

```

However, after doing this I can't save anything, ajax call fails. The error that I get back is:

This DataController does not support operation 'Insert' for entity 'JObject'.

JObject is what is being returned from the JSON.NET serializer. It isn't honoring the "\_\_type" property that is being attached to the entity.

Example JSON:

```
[{"Id":"0","Operation":1,"Entity":{"__type":"Product:#Catalog.Models","Sku":"adsfadsf"}}]

```

Is there anything that I can do short of dipping into the JSON.NET source code to fix this? Is there an update coming to the ASP.NET MVC 4 Beta that will fix this?