async function start(req, res) {
    const action = {
      type: ACTIONS.SCENE.START,
      scene: req.params.scene_selector,
      status: ACTIONS_STATUS.PENDING,
    };
    gladys.event.emit(EVENTS.ACTION.TRIGGERED, action);
    res.json(action);
  }
@api {post} /api/v1/scene/:scene_selector/start start
@apiName start
@apiGroup Scene