{
  "manageEntity": {
    "action": "Save",
    "entityId": "1749341770",
    "entityType": "Track",
    "nonce": "0x2352ea53e5056c0c9615094827aabdc453531410b7de9df22426793472a89827",
    "signature": "0x0dc84ff3b00de4ef649ec1406583158e889f870fd0a00ff8466384158afbd3246c1f6b9ab7fbdb2ff6c1be131b63e34beb79af971e14beef0592608ef4e0388b1b",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}