{
  "manageEntity": {
    "action": "Save",
    "entityId": "745757118",
    "entityType": "Track",
    "nonce": "0xc897c8502c0cd6f502c359c559056a619fbf69d69579e9701e4d5c573b522b66",
    "signature": "0x31e9d021e3219f4ebc8155c7133b28b6c2a3db5a2d13fe179b58e771dd5ea66f23ee63418f4ff6d92e9372146b9ff90f8088f1bbbae1bc570a10384688d0b4831c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}