curl --request POST \
  --url https://{issuer}/step-up/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "action": "payout",
  "amount": "900.00",
  "currency": "USD",
  "return_to": "https://app.example.com/payouts/confirm"
}
'

{
  "required": false
}