{
  "manageEntity": {
    "action": "Save",
    "entityId": "1563424683",
    "entityType": "Track",
    "nonce": "0x7999b287ea499094e085a4a43bd4a4ad7c237e432c7cb6326ad5d85f3cef85f0",
    "signature": "0x5adafd528d37db3515116b66ee12469ef2c05c9b0a6fcac42ee2158c40528259300d0018eae7eee31273cff309862a99cd1f465d42022851edcc982aeea3cff11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}