{
  "manageEntity": {
    "action": "Save",
    "entityId": "785574985",
    "entityType": "Track",
    "nonce": "0x3efb5460e629063b96e06a0a70be33840d0a1d641a80dcd612dc3cbe2c351b5a",
    "signature": "0x382e55dd205c7179ac6adba3273401c9493e53b2c20151a4d2ff0ae1d31906ab184111f29f9940a33eabee9b532aa7c3d17977a9995853a8f9eff362637f98691b",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "2047015"
  }
}