{
  "manageEntity": {
    "action": "Save",
    "entityId": "159624",
    "entityType": "Track",
    "nonce": "0x34826d99af300e7173e19a3e3d62ad0e0869315253b68b54b4b1a93b5adeb2c2",
    "signature": "0xe25b760af6da7f64bd82e2f9dff46cb396f818a2f941939139533b933b6414c01b12bf515d1767625a60a3cb2801bbfda2bfccc5eda717f1238ab0409efd14891c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}