Coincidentally, I just released a Sonos CLI NPM package over easter [1] that builds on some work done by others [2]. It is targeted primarily at circumventing the Spotify search functionality in the Sonos app, that more often than not times out and fails to give results. I just started using it at the office for quick playback control, and it takes away a lot of the frustration I have with the app.

[1] https://www.npmjs.org/package/sonos_cli [2] https://www.npmjs.org/package/sonos