POST request to the partner's webhook URL whenever a shipment status changes.webhookUrl - The full HTTPS URL where Flype should send shipment status updates.authenticationMethod - The authentication method required by the partner's webhook, if any.authorizationHeader - The header value Flype should include when calling the webhook, if required.POSTapplication/jsonPOST requests with a JSON request body.2xx response when the webhook is received successfully.Authorization: Bearer <partner_provided_token>