curl --request POST \
  --url https://saas.pads365.com/rdx/NDS.Services.Viewer/api/v1/Viewer/ViewerVariables/Import \
  --header 'Content-Type: multipart/form-data' \
  --form 'file=<string>' \
  --form file.0='@example-file' \
  --form file.1='@example-file'

{
  "ImportID": "<string>",
  "Variables": [
    {
      "Id": "<string>",
      "Name": "<string>",
      "Description": "<string>",
      "DefaultValue": "<string>",
      "NewDescription": "<string>",
      "NewDefaultValue": "<string>",
      "IsDeleted": true,
      "IsNew": true
    }
  ],
  "Values": [
    {
      "Id": "<string>",
      "VariableId": "<string>",
      "DestinationId": "<string>",
      "Value": "<string>",
      "NewValue": "<string>"
    }
  ],
  "Succeeded": true,
  "Message": "<string>",
  "Code": "<string>"
}