{
  "manageEntity": {
    "action": "Save",
    "entityId": "285473359",
    "entityType": "Track",
    "nonce": "0x2f8b4308e298820e2a7b28c02692db8d21b5292335d4751ceb043b2a8ca81101",
    "signature": "0x8a76b6f9bb7d85621b8b9168ffde2b63c2ef0138376083918d671239c615ae675b08f673751b5ab58d3e20fbecacc9150c7b84937fb0bfcf6c875aa9e8cb97fe1b",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}