@James correct, the rule executes playPreset. Below is an example of one.
From the testing I did, the rule is working correctly, but the Sonos queue is not cleared before adding the playlist. If I start with a clear Sonos queue the playlist is added. If I then click another playlist it seems to add the playlist and shuffle the queue. So now the queue is made up of any songs already in the queue and the newly added playlist. Let me know if you want me to capture any screenshots of this.
Thanks for checking it out! Just curious if others have noticed this behavior and if there is a way to force it to clear the queue. I noticed if I start the playlist from the Sonos app it does clear the queue so wondering if it is something with the Smartthings/Sonos integration?