Footer
Messages can have a footer, which is the text that displays at the bottom of a message.
The footer can consist of an image, text, and or a timestamp. This message type also supports Markdown and @mentions.
To add a footer to your message, the parent object in the body array must be of type section.
Inside the sections array you can add your message type.
footer_icon: an image, pass in an image urlfooter: the text to displayts: a date in milliseconds (Unix timestamp)
A recent timestamp displays in relative time (30 minutes ago). If not recent, it displays in MM/DD/YYYY HH:MM AM/PM format.
Example

JSON example
{
"head": {
"text": "I am a header",
"sub_head": {
"text": "I am a sub header"
}
},
"body": [
{
"type": "section",
"sections": [
{
"type": "message",
"text": "I am a message with text"
}
],
"footer": "I am a footer",
"footer_icon": "https://d24cgw3uvb9a9h.cloudfront.net/static/93516/image/new/ZoomLogo.png",
"ts": 1560446471819
}
]
}