post https://api.dengage.com/rest/transactional/whatsapp
The SendTransactionalWhatsapp function sends transactional WhatsApp messages to recipients.
You must use your own partnerId (which you can find in the dEngage Panel > Instant Message Partner Details page) along with the payload to send messages.
One important note: you can send only one message to a single recipient at a time.
If the components required for the specified WhatsApp message template (templateName and languageCode) are not provided, the request will return a successful response, but the message will fail to send.