Replacement for RIS API in IDM4.7.x?

WE are using IDM4.6 and using RIS API to invoke workflows . Sooner we will be upgrading IDM to 4.7.x where RIS API is deprecated and we will have to use new alternate APIs. 

request/permissions and permission/Items are among them probab;y, we tried these APIs without success. we have referred the format in idm doc ,still we have doubt on how to use the new parameters for our  current workflow forms data. 

If we get sample working Payload for the alternate APIs to RIS , it would be helpful.