{
  "manageEntity": {
    "action": "Save",
    "entityId": "411524",
    "entityType": "Track",
    "nonce": "0xfbd533d05dea3dea2aca76023902b75d2a87dbf2f24e9646e69a06e0429ee6ef",
    "signature": "0xf822faaf96e4fe8fbb8e441dd0c43d9c11d581a6804af2470b4ca60e7b8fe5885d34a4ea5b2ad7c010527f90ed110d39b2a34dc3d13cd6950595feac22241e731b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}