SIM7600 Send JSON data via HTTPS POST

I require help with two things.

First, I want to send JSON data via raspberry pi to my server. There’s no official documentation of how to attach JSON data in the HTTPS Post request. Kindly help me with this.

The second thing that I have succeeded in starting the net connection, obtaining the IP address, and initiating the HTTPS session. Now after starting the HTTPS session I receive 13 and sometimes 15 as error code. I don’t know what that means.



And after this when I try AT+CHTTPSSEND=11 (with any value) I get an ERROR.
Kindly guide me on how to proceed. Right now I am using a Jio sim(4G LTE)