{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787216890",
    "entityType": "Track",
    "nonce": "0x3524b5b76752ffa248d1df559cde73e733de0083999b34819dc00b169c54c1fd",
    "signature": "0x194e1d4ea34e3f8e171344b8659ddd9e8ef6bb858fa8e792040f4f122a62c1cc06b39ed5a4efb86e367e48214e1c8cb1127e22349d094c409ffea8b9a4b5b4441b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}