{
  "manageEntity": {
    "action": "Save",
    "entityId": "174531998",
    "entityType": "Track",
    "nonce": "0x4bb459dbef2c0f1ac0d7bc7566e6fe6aeb04702f881d3f3a7b72b795a5f4d2e9",
    "signature": "0x8e38b058e0c081e94c73e0a16a5773fd7132b961d7be1db182ef381cf5c41c3b3cae3e832d2800af4107cb673406a9c148c0af3c1cf765dc7218f8bbd5e7e19e1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}