curl --request POST \
  --url https://api.pocketsflow.com/upsells \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "productId": "<string>",
  "upsellProductId": "<string>",
  "title": "<string>",
  "description": "<string>",
  "active": true
}
'