{
  "manageEntity": {
    "action": "Save",
    "entityId": "327334625",
    "entityType": "Track",
    "nonce": "0x1a6dd01d530f7e88ea9096be59cf2e5e02144bfc04c3e56c8ff21ec8520d0d82",
    "signature": "0xce0e5412168bea45269d50c91f4dc56cf3fda86799eb16db6fb6b5746bf753650534775ea943d285816c7a14a087dac84e6488ca23b840d872ddb99e50a3a5901b",
    "signer": "0xb23FFd6D016E95A4022Fbe25C4a1179AF8492788",
    "userId": "990308344"
  }
}