Playing Music to my Sonos One Speaker does not work

Hello,
for some days i try to play music to my sonos speaker, nothing happend :frowning:
Is there a manual a can follow?

i Have music on my Synology NAS. Is there a opportunity to play my playlists to my sonos one speaker?
alternativly i have mound my NAS music to Home Assistant but nothing worked but can listen on my PC but no streaming to Sonos One. I Also have copied locally MP3 Files but also nothing happens.

i used Media Player: Play Media
content type: music
content id i passed the link /local/music.mp3

what do i wrong?
Is it possible to stream a folder or playlist to my sonos speaker and how?

Testet also with sportify free and also nothing working :frowning:

Greetings