{
  "manageEntity": {
    "action": "Save",
    "entityId": "1583528139",
    "entityType": "Track",
    "nonce": "0xd4dbd98f0d2aba9985967c4b0e51314a4035893f7aeb9c651cb764449cea8641",
    "signature": "0x8552ee676856be142bff9097b9f740a90931a448e1a21ca3f618a0874d71a3a57c845926685caba5daaab81cc9f340fb555bddc320501e82812d9a1a27a69c7e1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}