This is a notification from the API when a message is received at the Ongair hosted account. It takes the form of a HTTP POST to the specified URL with the following parameters:
|notification_type||String||MessageReceived||The type of the notification|
|phone_number||String||(country code)(phone number) e.g. 254722200200||Phone number that sent the message|
|text||String||Hello world||The message text that was received|
|account||String||254722123456||Your WhatsApp account number|
The client should respond with a HTTP status code of 200. The response body is ignored.