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

{
  "content": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "created_by": "<string>",
  "description": "<string>",
  "id": "<string>",
  "mime_type": "<string>",
  "refinement_id": "<string>",
  "title": "<string>",
  "updated_at": "2023-11-07T05:31:56Z"
}