Text
Use the message message type to display text in the body of a chatbot message. Place this message type under head content. This message type also supports Markdown and @mentions.
Example

JSON example
{
"head": {
"text": "I am a header",
"sub_head": {
"text": "I am a sub header"
}
},
"body": [
{
"type": "message",
"text": "I am a message with text"
}
]
}