{
  "manageEntity": {
    "action": "Save",
    "entityId": "509779562",
    "entityType": "Track",
    "nonce": "0x72aaa7d2ffec258bf64635408538de8031456e0d434710cb20eb4bae5c981d65",
    "signature": "0xe8da76ab55743d22bec7ce55599b83d9373f03540958e6ef47114164f4bc26130b5715dd9f5c1d1772d6f9bee7ee863f33cd71830b3c66ef3d46ddd5bfefd54a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}