Setting up playback command with Sonos binding

Hi. I have loaded openhab2 onto a RPi3 and have had some success creating a simple small home automation system, (still in project mode). Anyway have followed the post from :- and have Sonos Play1 up and running. It will play whatever the last album, track or radio station was being played previously. That`s fine really as my wife just listens to one radio station anyway. What I would like to do is to select an album to play thru openhab2 interface but do not know how to do this. I have gone thru most of the docs trying to figure it out and experimenting but failed. Can any one help???