{
  "manageEntity": {
    "action": "Save",
    "entityId": "483537975",
    "entityType": "Track",
    "nonce": "0x0fff27f9471cc88b14be53a5fdffcd1ff9ae27a8e9c27a26b000c79bab0c9e21",
    "signature": "0x6576cd906cdbb38cca364abbddbc6d4d296d28c684b2de3c1eefe1ea48c98eac514a2f3d5769392965c968ff4934118519c186accb8dddd4caa410e69f54f1be1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}