curl --location --request POST 'https://slack.com/api/chat.update' \
--header 'token;' \
--data-urlencode 'channel=' \
--data-urlencode 'ts='
{
"channel": "C024BE91L",
"message": {
"text": "Updated text you carefully authored",
"user": "U34567890"
},
"ok": true,
"text": "Updated text you carefully authored",
"ts": "1401383885.000061"
}