{
  "manageEntity": {
    "action": "Save",
    "entityId": "436418843",
    "entityType": "Track",
    "nonce": "0x3209c033ec08acdef03833cc6d60b5440dfbf8b360c91d6fd855364f320cec6f",
    "signature": "0xe501d25fc4f786837fa3fba12ce848bf331bff45ebf04036db3a7cc90c5ade2f43683efca98e454c7585190c426967e5f6d615da94162f33dd211b7b38654c621c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}