curl --request POST \
  --url https://api.plais-sandbox.finventi.com/api/v1/payments/{paymentInstructionId}:confirm \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 123,
  "currency": "<string>"
}
'

{
  "result": {
    "accepted": "<string>"
  }
}