post https://api.amio.io/v1/messages
![whatsapp_postback.png 1600](https://files.readme.io/9854f5a-whatsapp_postback.png)
From left to right: 1. User received a message with buttons menu. 2. User opened the buttons menu. 3. User clicked the Track Package button.
From left to right: 1. User received a message with buttons menu. 2. User opened the buttons menu. 3. User clicked the Track Package button.