sendMessage(msg, timeoutSecs = 60) {
    if (this.alwaysdebug) msg.cmd.debug = true;
    let cborData = msg.toCbor();
    return this.sendRequestObj(cborData, timeoutSecs);
  }
Send a message over the websocket to HoloPlayService.
@public
@param {Message} msg - message object
@param {integer} timeoutSecs - optional, default is 60 seconds