Hi, Mahesh.
I didn't have a time to make tests in order to respond to your previous post.
But my OData services can create new data in my entities. I use a SQLScript procedure to create new entries, and I had to reactivate my procedures, roles and re-grant activated roles (with procedure mentioned in my previous post).
I recall some issues with "create" method, there was 403 error too (as I long as I remember). But it was just after the earliest availability of HCP after update, there were a lot of another problems also (e.g. WebIDE was unavailable too with 403 code). So since that time I've changed my procedure many times, and currently it works as expected.
Finally: reactivate procedure -> reactivate roles -> regrant roles. Hope it will help.
Regards,
Andrey.