JDBC Stored Procedure With Signature Adapter Question!

Hello all, here’s my dilemma:

I have a created an adapter service that calls a stored procedure on an oracle database(that I did not write/cannot change), the input for the adapter service is a PL/SQL Record but I have a document with the same fields, how do I change the document to a PL/SQL Record??

I have searched online quite a bit but cannot seem to come up with anything, any help would be greatly appreciated, Thanks!