{
  "manageEntity": {
    "action": "Save",
    "entityId": "922049266",
    "entityType": "Track",
    "nonce": "0xcfec76f5797299b898366ab93746c70b687d3875822d106c77f0655477533fd4",
    "signature": "0xc70f8007661691d0aae4654477b2c6c6d24813b51cacd0e329d1e6542f5c67560f25a0eb6b3161009b77cfbfe586ea3996d670d42d4b6887cb48bca92d2476b61c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}