curl --request POST \
  --url https://transfer-sandbox.payven.com.tr/api/v1/webhooks/transfer-notification \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "external_key": "<string>",
  "shadow_card_number": "<string>",
  "product_ref_no": "<string>",
  "success": true,
  "error_description": "<string>",
  "channel_id": "<string>",
  "additional_data": {}
}
'

{
  "status": "<string>",
  "message": "<string>",
  "external_key": "<string>",
  "processed_at": "<string>"
}