{
  "manageEntity": {
    "action": "Save",
    "entityId": "545537",
    "entityType": "Track",
    "nonce": "0xdd4777f2c7a0014eb152baee3f592799aa8c6c1a15fe04ee15177f4eecffad5f",
    "signature": "0xcefe1624fd58254b56a3f6f29bac4ffa8fe58819a08536a75007cc2936410c30491f650471e1f4826c06e84b21ebeb34406e38a18f5173843cf0ec01b09c69c41b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}