Send Interactive Buttons Message

InteractiveButtonsMessage

Header:
{
"type": "Text or Video or Image or Document",
"text":"header text for type Text",
"media": {
"url":"https://...", // (media obj should be not empty for non Text types)
"fileName": "MyDoc.pdf"} // (this field is only Document type)
}
Buttons:
allowed count: 1-3
Allowed characters length after mapping:
header text: 60
body text: 1024
footer text: 60
button's text: 20