curl --request POST \
  --url https://api.example.com/api/v1/cards/{card_id}/knowledge \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content": "<string>",
  "title": "<string>",
  "description": "<string>",
  "mime_type": "text/markdown",
  "source": "manual"
}
'

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