chromium/chrome/test/data/web_share_target/multimedia.json

{
  "name": "Multimedia web app",
  "icons": [
    {
      "src": "basic-48.png",
      "sizes": "48x48",
      "type": "image/png"
    },
    {
      "src": "basic-192.png",
      "sizes": "192x192",
      "type": "image/png"
    }
  ],
  "start_url": "multimedia.html",
  "display": "minimal-ui",

  "share_target": {
    "action": "/web_share_target/share.html",
    "method": "POST",
    "enctype": "multipart/form-data",
    "params": {
      "files": [
        {
          "name": "audio",
          "accept": ["audio/*"]
        },
        {
          "name": "image",
          "accept": ["image/*"]
        },
        {
          "name": "video",
          "accept": ["video/*"]
        },
        {
          "name": "notes",
          "accept": ["*/*"]
        }
      ]
    }
  }
}