Hi, i got some info from here:
https://forum.xda-developers.com/fire-tv/help/ip-rest-api-controlling-fire-tv-t3290313

Also check this one:
https://github.com/happyleavesaoc/python-firetv

And try to use as example for understanding this module:
https://www.iridiummobile.net/download/software/v2/module/samsung_smart_tv/