{
  "manageEntity": {
    "action": "Save",
    "entityId": "984602",
    "entityType": "Track",
    "nonce": "0xe6156d42c6399207a3a4a1feb8b671c9789d5de42ffada5f7ec86cf611c2646c",
    "signature": "0xeeadead534fdd5454e8b233efd0dc4ae59bf3bf6c6e2ec9c6650d3bbd5dcf8a417b40141ae0aba8412238939664c60bcd8e9c523df02a8e7a3d22fd5a8913e921c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}