curl --request PUT \
  --url https://api-next.ofauth.com/v2/access/promotions/bundles/:bundleId \
  --header 'Content-Type: application/json' \
  --header 'apiKey: <api-key>' \
  --header 'x-connection-id: <api-key>' \
  --data '
{
  "discount": 50,
  "duration": 183
}
'

{
  "id": 123,
  "discount": 123,
  "duration": 123,
  "price": 123,
  "canBuy": true
}