mutation UpdatePublicPageBookingSettings {
  updatePublicPageBookingSettings {
    customerCancellationValue
    customerCancellationUnit
    customerCancellation
    allowSelfScheduling
  }
}

{
  "data": {
    "updatePublicPageBookingSettings": {
      "customerCancellationValue": 1,
      "customerCancellationUnit": "string",
      "customerCancellation": "string",
      "allowSelfScheduling": true
    }
  }
}