What is the API for Create , Amend , Renew and Terminate subscription ?

**This post was created as part of a How to Service Request (SR)

 Release:

22B

 Summary of the question:

 Does OSS utilize similar functionality within OSS , that can be leverages by its API’s?

Use cases : Create , Amend , Renew and Terminate subscription

Supporting Documents if any:

[None]