{
  "manageEntity": {
    "action": "Save",
    "entityId": "1344753882",
    "entityType": "Track",
    "nonce": "0x1c65979566bfdb8d640ca052bfec5e04f943006ca66577f2e641ba173d782eb1",
    "signature": "0x471bdb441331f2528551aa1df4b4ecf83f5612ade2f49fbd283ee14ac5e252376d2304d090987399978c088d20d062901f9ea82c3b2d564fb43750249b4cd40c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}