curl --request POST \
  --url https://api.example.com/api/v1/presets/{preset_id}/courses \
  --header 'Content-Type: application/json' \
  --data '
{
  "blueprint_id": "sales_v1",
  "external_ref": "<string>",
  "language": "fr",
  "review_level": "<string>",
  "source_files": [
    {}
  ],
  "source_urls": [
    "<string>"
  ],
  "target_module_count": 123
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "ctx": {},
      "input": "<unknown>"
    }
  ]
}