How to use token substitution in the payload with the POST method in the REST API Modular Input Add-on?

Hey all, I use the REST Modular Input to fetch some Data from a Backup System. Everything works fine, even Token substitution ($ids$) with the GET method. Now I need to fetch data with the POST method on a single endpoint but where the **Token substitution** takes place in the **request payload**. So in principle something like: request_payload = Is there a way to implement this?