curl --request POST \
  --url https://gateway.varchev.com/kyc/face \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-token: <x-token>' \
  --data '
{
  "idPhoto": "data:image/png;base64,/9j/4AAQSkZJRgABAgAAAQABAAD"
}
'

{
  "idPhoto": "<string>"
}