chromium/components/test/data/payments/just-in-time/pay.json

{
  "default_applications": ["pay.json"],
  "name": "Test Payment App",
  "short_name": "Test",
  "icons": [{
    "src": "/icon.png",
    "sizes": "40x40",
    "type": "image/png"
  }],
  "serviceworker": {
    "src": "sw.js",
    "use_cache": false,
    "scope": "/just-in-time/"
  }
}