Set Boost in AVM Thermostat

Hi,

I would like to set the boost of my AVM thermostat. But what I have seen and tested so far is the setting of ECO and COMFORT only possible. But according to AVM REST API (https://avm.de/fileadmin/user_upload/Global/Service/Schnittstellen/AHA-HTTP-Interface.pdf) it would work. Now my question, does anyone have example for implementing REST in HA ideally with AVM?

thx
Attila