title: OData version4 deep insert
body: <p>I am trying to find out how to deep insert in odata v4. Odata v4 specification says that deep insert is possible. But I have tried it in several ways but unable to find out the solution. Whenever I am trying to post an entity with its navigation data, it is being received null on server side. 
  Anybody has any idea on this. Thanks</p>