curl --request POST \
  --url https://app.blogbowl.io/api/v1/pages/{page_id}/categories \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "slug": null,
  "description": null,
  "color": null
}
'

{
  "id": 123,
  "name": "<string>",
  "slug": "<string>",
  "description": "<string>",
  "color": "<string>",
  "page_id": 123,
  "created_at": "<string>",
  "updated_at": "<string>"
}