Sonos binding: How to send spotify uri to speaker?

Hello together,

I‘m currently trying to send a spotify play uri to a sonos speaker. I tested serval channels like
_playlist and _playuri I tried serval different sporify uri‘s. The one from the spotify binding, the official one from spotify and also the one i could read on the sonos channels.

However each time i send one fo this to the speaker it is not working. Has anybody some working example and could help me. Which channel schould be used for this purpose? And how should i format the spotify uri?