curl --request GET \
  --url https://vantage-us.abbyy.com/api/publicapi/v1/api/publicapi/v1/transactions/{transactionId}/documents/{documentId} \
  --header 'Authorization: Bearer <token>'

{
  "documentId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "sourceFiles": [
    {
      "id": "<string>",
      "name": "<string>"
    }
  ]
}