{
  "manageEntity": {
    "action": "Save",
    "entityId": "196926852",
    "entityType": "Track",
    "nonce": "0xb230654d5274c86bf6673a18f295d1c55c8a1bcdfc51317357b57842530114b9",
    "signature": "0xd0e053ff6a7e67b8ac1f32dae4da03c9b5b81a41da5f8a81af0671254094ec8c6ff4f2fe05aab09ebe351bc26998d001f13abf33d708c695748c91fa7055f69c1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}