curl --request POST \
  --url https://api.example.com/v2/documents/{document_uuid}/sign/confirm/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "confirm_id": "<string>",
  "code": "<string>"
}
'

{
  "confirm_id": "<string>",
  "code": "<string>"
}