Hi Atanu,
I did try out what you suggested.
Unfortunately, it doesn't work out.
I have to either attach contents of lo_container to er_entity or else response has 2 options to come out-
1. the input payload as output response.
2. a big red message "METHOD GET_ENTITY NOT IMPLEMENTED IN DATA PROVIDER CLASS".
Either way, not what i'm looking for.
Nevertheless, Ashwin helped me achieve what i was looking for.
Thank you for your input though.
Cheers,
-NK