chromium/chrome/test/data/banners/manifest_chrome_url.json

{
  "short_name": "Manifest",
  "name": "",
  "icons": [
    {
      "src": "image-512px.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "start_url": "chrome://settings",
  "display": "standalone",
  "orientation": "landscape"
}