{
  "manageEntity": {
    "action": "Save",
    "entityId": "222846797",
    "entityType": "Track",
    "nonce": "0xa6da0a82ed4ffdbfd24d3f88ca0385f1d6d8db4394efdd58015f17ac11cef978",
    "signature": "0x9284e916432b2b6791eb4b67c0312f660ecc8000097567f515ac9a0cc4f428017ff5873d46f4ee376f6ff9928f506f959028aa1ebf6b7f4178462bd2af1c97d51c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}