curl --request POST \
  --url https://api.sprucecollective.co.uk/merch/products \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "active": true,
  "asset_url": "<string>",
  "collection_id": "<string>",
  "color": "<string>",
  "created_at": "<string>",
  "id": "<string>",
  "image_url": "<string>",
  "item_id": "<string>",
  "locale_id": "<string>",
  "metadata": {},
  "name": "<string>",
  "price_gbp": 123,
  "site_id": "<string>",
  "sizing": "<string>",
  "sku": "<string>",
  "slug": "<string>",
  "updated_at": "<string>"
}
'

{
  "active": true,
  "asset_url": "<string>",
  "collection_id": "<string>",
  "color": "<string>",
  "created_at": "<string>",
  "id": "<string>",
  "image_url": "<string>",
  "item_id": "<string>",
  "locale_id": "<string>",
  "metadata": {},
  "name": "<string>",
  "price_gbp": 123,
  "site_id": "<string>",
  "sizing": "<string>",
  "sku": "<string>",
  "slug": "<string>",
  "updated_at": "<string>"
}