{
  "manageEntity": {
    "action": "Save",
    "entityId": "785322",
    "entityType": "Track",
    "nonce": "0x983c4d63dea88dadfc0d2ac0e4a3cd725afa6cf8bad3ad5e1a3930bededcf4fe",
    "signature": "0xcd64ea7ccf4e7c3accad973238d63bde195239257b9d0ce686638e456051d21f5f600cf81b0981e6d207e670881e54cbce775e888a1968b3ef38bf638e1057411b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}