curl --request POST \
  --url https://api.headlesscommerce.io/v1/admin/collections \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "slug": "<string>",
  "description": "<string>",
  "product_ids": [
    "<string>"
  ],
  "metadata": {}
}
'

{
  "id": "<string>",
  "name": "<string>",
  "slug": "<string>",
  "description": "<string>",
  "type": "manual",
  "position": 123,
  "metadata": {},
  "created_at": "2023-11-07T05:31:56Z"
}