curl --request PATCH \
  --url https://api.shoppex.io/dev/v1/products/{uniqid}/variants/{variantUniqid} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "description": "<string>",
  "price": 1,
  "price_modifier": 123,
  "stock": 123,
  "stock_delimiter": "comma",
  "license_period": 2,
  "option_values": {},
  "is_default": true,
  "sort_order": 123
}
'

{
  "data": {
    "id": "<string>",
    "uniqid": "<string>",
    "product_uniqid": "<string>",
    "title": "<string>",
    "description": "<string>",
    "price": 123,
    "price_modifier": 123,
    "stock": 123,
    "stock_delimiter": "<string>",
    "license_period": 123,
    "is_default": true,
    "sort_order": 123,
    "created_at": 123,
    "updated_at": 123,
    "option_values": null
  }
}