```sh
curl https://pcast-stg.phenixrts.com/pcast/channel/us-central%23phenixrts.com-alex.zinn%23frontendWebsocket.LnQnpYeK26hH/message \
-u "${APPLICATION_ID}:${SECRET_STG}" \
-H "Accept: application/json" \
-H "Content-Type: application/json" \
-X PUT \
-d '{
         "message": {
            "from": {
                "screenName": "Me",
                "role": "Moderator",
                "lastUpdate": 0
            },
            "mimeType": "text/plain",
            "message": "This is my chat message",
            "tags": ["my-tag", "my-other-tag"]
        }
    }'
```