curl https://api.tradly.app/products/v1/listings/{{listing_id}}/variants/{{variant_id}} \
  -H "Authorization: Bearer YOUR_PUBLISHABLE_OR_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

{
  "status": true,
  "data": {
    "listing": {
      "id": 1,
      "title": "Sample listing",
      "list_price": 99,
      "currency_id": 1,
      "stock": 5
    }
  }
}