{
    "name": "Example",
    "short_name": "example",
    "start_url": "http://example.com",
    "icons": [
      {
      "src": "/path/to/icon.png",
      "sizes": "192x192",
      "type": "image/png"
      }
   ],
    "theme_color": "#ffffff",
    "background_color": "#ffffff"
  }