How to generate inline POST rest URL grammatically for user interaction in VRO 7 workflow ?

Dear,

I would like to implement the below scenarios:

1) Create two inline POST rest URLs for user interaction dynamically in VRO workflow.

2) Send those two links via Email to Approvers.

3) Approveers can Approve/Reject the request based on the provided POST rest URLs links in the mail.

4) Once Approver will trigger the link, the User Interaction Component ( within the Workflow) will be completed.

I followed the below link.

VMware vSphere 5.1

Can you please help me out how to generate POST rest URL dynamically for user interaction ? I need to know the exact inline POST url for this purpose.

I have executed the Sample WF under (library/HTTP-REST/REST-Samples) manually and it;s working fine. I would like to generate the POST url inline grammatically.

Thanks,

Koushik