post {protocol}://api.ws.sonos.com/control/api/{version}/groups//playback/pause
Use the pause command in the playback namespace to pause group playback.
After a successful pause command, if your app is subscribed to the playback namespace, it will receive a playbackStatus event with either PLAYBACK_STATE_PAUSED or PLAYBACK_STATE_IDLE, depending on the audio source loaded on the group.