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

{
  "name": "Manifest test app",
  "scope": "/",
  "icons": [
    {
      "src": "image-512px.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "start_url": "isolated/simple.html",
  "display": "standalone",
  "orientation": "landscape",
  "permissions_policy": {
    "usb": [ "*" ],
    "direct-sockets": [ "*" ]
  }
}