curl --request GET \
  --url https://api.pgw-sandbox.finventi.com/v1/external-transaction-reference

{
  "amount": 123,
  "currencyCode": "<string>",
  "endToEndId": "<string>",
  "orgnlMsgId": "<string>",
  "settlementDate": "2023-12-25",
  "creditorBic": "<string>",
  "creditorIban": "<string>",
  "creditorName": "<string>",
  "debtorBic": "<string>",
  "debtorIban": "<string>",
  "debtorName": "<string>",
  "method": "<string>",
  "purposeCode": "<string>",
  "remittanceInfo": "<string>",
  "ultimateCreditorName": "<string>",
  "ultimateDebtorName": "<string>"
}