{
  "gcm_sender_id": "220489913581",
  "display": "standalone",
  "name": "TTech",
  "icons": [
    {
      "src": "assets/images/tt.png",
      "sizes": "400x400",
      "type": "image/png"
    }
  ],
  "start_url": "/?start_url",
  "scope": "/",
  "background_color": "#fff",
  "theme_color": "#fff",
  "screenshots": [
    {
      "src": "assets/images/tt.png",
      "sizes": "400x400",
      "type": "image/png"
    }
  ]
}