Peoplesoft REST Service Operation difference between Document Template and Document Message

Hi

We are on Peopletools 8.55 and trying to provide a REST based service to a third party system.

Our message is Hierarchical (Employee name/addresses/Phone numbers etc)..

We have created a "compound document" using a parent/child relationship..

We found that the "Document Template" needed in URI section of service operation, should be simple..(and cannot use compound variables)..

I have tried creating a simple document (template), only with the keys..  Now I am getting this error while trying the POST operation.. When I try to use this, I am getting this message

"The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent."