mutation PreparePublicPageImageUpload($input: PreparePublicPageImageUploadInput!) {
  preparePublicPageImageUpload(input: $input) {
    uploadUrl
    key
    filename
    contentType
    byteSize
  }
}

{
  "input": {
    "name": "string",
    "filename": "string",
    "contentType": "string",
    "byteSize": 1
  }
}

{
  "data": {
    "preparePublicPageImageUpload": {
      "uploadUrl": "string",
      "key": "string",
      "filename": "string",
      "contentType": "string",
      "byteSize": 1
    }
  }
}