post {protocol}://api.ws.sonos.com/control/api/{version}/sessions//playbackSession/seek
Use the seek command in the playbackSession namespace to seek to the position in the track with the specified itemId in a cloud queue. This command requires your app to have either created a new session or joined an existing session, and also loaded a cloud queue on the group with loadCloudQueue.
Use itemId to ensure the group seeks on the current item. If the current item’s itemId does not match the one provided, the player returns an ERROR_INVALID_OBJECT_ID error.