Reservation System setup

I don’t quite understand how the api for Reservation System setup works.
I tried to configure as mentioned in the page Reservation System setup | Jitsi Meet. I don’t understand if I see a post made to the configured url (in my case rameet.xxxx.yyyy/conference with which parameters in the post? in the case of a “local” user configured with prosodyctl how is the payload of the call. I tried to configure as it says in the guide but I can’t understand how to define the payload of the call Last question in this way it is possible to define a sort of schehdulation for the meeting right?