Retrieve one sound-effect category by ID. The category's subcategories relationship is always present; use include=subcategories to include each subcategory's attributes in the response.

curl "https://api.soundstripe.com/v1/categories/12?include=subcategories" \
  -H "Authorization: Token YOUR_API_KEY" \
  -H "Accept: application/vnd.api+json"

A category that does not exist returns 404. Invalid include values return 400.