{
  "type": "SyncCollection",
  "sync_token": "abc",
  "properties": {
    "type": "Prop",
    "data": [
      {
        "type": "WebDav",
        "data": {
          "type": "GetETag"
        }
      }
    ]
  },
  "depth": "Infinity",
  "limit": 9
}