post https://api.dengage.com/rest/transactional/whatsapp
SendTransactionalWhatsapp function sends transactional whatsapp messages to recipients.
You shall use your own partnerId (you should get it from dEngage Panel > Instant Message Partner Details page) and payload to send messages.
One important thing is you can only send single recipient with single message.
If the components suitable for the sent (templateName & languageCode) whatsapp message template are not sent, the request will return successful response but the sending will fail!