{
  "manageEntity": {
    "action": "Save",
    "entityId": "1433207356",
    "entityType": "Track",
    "nonce": "0x919f5d5835517803cfb09c916a55214cf80453b3c11ab9de748b8ccb5e0a6bb4",
    "signature": "0x9e2fbc13e8f823e28a91a95c1e2f53f9b856d7d417dda583d68d754cbf752eaa7807d81df2a1b8741dd92f78bc64bee04b0391ffbb73bab0cb3f9c1341d452b01b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}