{
  "manageEntity": {
    "action": "Save",
    "entityId": "1326894777",
    "entityType": "Track",
    "nonce": "0xb3845f16450be155fccae7115473fb6f8f22a8a5d38e53bc50197f4e2ee43364",
    "signature": "0xd81a5e5ed17520f692e711e85e21f0cf8190b0bd2950a782d6a8a7a63934b29a4478cc6b55981cb4c9cb124927cf79bb399fe35ad79c3c665f0a08b99901731e1c",
    "signer": "0x9881bA04eA95d8a4De5594aBC9DBd5c96F38eF34",
    "userId": "211307"
  }
}