{
  "manageEntity": {
    "action": "Save",
    "entityId": "1099719",
    "entityType": "Track",
    "nonce": "0x63dc97d9f1dec7737ec9e4062ca2f37071e5d365ceaa1b550dad52df234cc94f",
    "signature": "0x2a597327642363d0fab816d6c8eb55196cd8ebb5c969ee9498e9ad7717d07d7727f239525e2a5d1734b0d68d290c4490717f3507cf17c3c67410528a410f7d381b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}