curl --request POST \
  --url https://demo.onlinebillingform.com/api/v2/marketing/update-discount \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "discount_id": 123,
  "minimum_value": 123,
  "discount_value": 123,
  "start": "2023-12-25",
  "type": 123,
  "uses": "<string>",
  "end": "2023-12-25",
  "selected_packages": "<string>"
}
'

{
  "success": true
}