{
  "manageEntity": {
    "action": "Save",
    "entityId": "1778499572",
    "entityType": "Track",
    "nonce": "0xdbeb8203766a85c589b111655f7b00fb4fcbeb505d589744ceb16b79e3f82bfa",
    "signature": "0xac66d7ffb48ede0c0a7d4897132a042902eb4ff56c8a8039f4181f46b3c1328278ae2543fc2f11066e65df6edae2d6b66d63e5055f6242da8d1b8ae768c8cc451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}