{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077777097",
    "entityType": "Track",
    "nonce": "0x8d0ec0e02e34b4504df9f3d90e3c14c94cbeabf6e211866055b764c7e36f8850",
    "signature": "0xf5d7543c4a6c56f0911f754f860a04de718ec15b6d47ae1a730e808ceaf1bdb76ecdd675a11edd433d3501b1c556b0f5f7c74392ac93b65d2cd96d9cfabbb62a1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}