{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111886",
    "entityType": "Track",
    "nonce": "0xb1b8a5da495093e39abbe55e43634e52842227e12bc50061e4b0dd5fba3ce322",
    "signature": "0xef7bfd2b365850746559daac7614cde01a4c0833849e4a997eb9c3cd79a664d01b9767ca5d56e0fffd11b2d8d4925ad20acc1a530186938cf29fe9af1f0cb6891c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}