Testing a Deep Insert - Json: OData Create Sales Order BAPI for POST

Hi Experts,

I have created a OData service for Create Sales Order with deep entity set with the help of following link OData Service with multiple entity set for Create SO: using standard BAPI in OData, but I am facing a problem during testing of service using json code as Input. I have not implemented the Query and Read operations for the same, because this "Create SO" it is based on standard BAPI - BAPI_SALESORDER_CREATEFROMDAT2. I need a json code to test my service. Please suggest.

Thanks

Saurabh