How to pass BAPI return internal table through POST method

We have below requirement, please help me know how to proceed with this:

Input Structure ZABC:

Field1

Field2

Field3

Field4...

Take the values from Input structure ZABC and create a document in SAP Backend through some BAPI.

Output:

Once the Document is created, pass the BAPI return ITAB values along with ZABC as output through Odata Service.

Thanks a lot in advance for your help.