{
  "manageEntity": {
    "action": "Save",
    "entityId": "698863101",
    "entityType": "Track",
    "nonce": "0x0c778c7f91e40f9d7bcd4ddf03606f1ffed7c9641d2c3219eb91afe69f7ff70c",
    "signature": "0xdd5857ce47a3189b9e58fcdc42fb4c534991ae8c00df57a7686c60c9597a7c6b2a8c3fb8315f2090db027c910e3990edfb90e0e46c2f832c0d52bd0cb56ecd0d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}