播歌，應該是擺了智慧音箱之後，除了找我的手機以外的最常用功能了吧。

https://github.com/actions-on-google/dialogflow-conversation-components-nodejs

app.intent('media response', (conv) => {
  if (!conv.hasAudioPlayback) {
    conv.ask('Sorry, this device does not support audio playback.');
    return;
  }
  conv.ask('This is the first simple response for a media response');
  conv.ask(new MediaObject({
    name: 'Jazz in Paris',
    url: 'http://storage.googleapis.com/automotive-media/Jazz_In_Paris.mp3',
    description: 'A funky Jazz tune',
    icon: new Image({
      url: 'http://storage.googleapis.com/automotive-media/album_art.jpg',
      alt: 'Media icon',
    }),
  }));
});

像這樣去倒mediaObject就可以了。