curl --request POST \
  --url https://saas.pads365.com/rdx/NDS.Services.Viewer/api/v1/Viewer/ViewerVariables \
  --header 'Content-Type: application/json' \
  --data '{
  "Variables": [
    {
      "Id": "<string>",
      "Name": "<string>",
      "Description": "<string>",
      "DefaultValue": "<string>"
    }
  ]
}'

{
  "Succeeded": true,
  "Message": "<string>",
  "Code": "<string>",
  "Results": [
    {
      "Succeeded": true,
      "Message": "<string>",
      "Code": 123,
      "Id": "<string>"
    }
  ]
}