Using Confluence Wiki with Mattermost

Hello,

Mattermost is using a slack compatible interface. I tried to install the following plugin Slack for Confluence Pro in Confluence and configured a the incoming web-hook of Mattermost.

The good news is that it is working out of the box and I can see Confluence changes now in Mattermost.

The pre-configure Notification format is configured by default for Slack and it is not rendered correctly in the my Mattermost channel:

[
  {
    "fallback": "${spaceTitle} - ${pageTitle} ${action} by ${actionUserName}: ${pageUrl}",
    "pretext": "${action} in Space <${spaceUrl}|${spaceTitle}>",
    "title": "${pageTitle}",
    "title_link": "${pageUrl}",
    "text": "${versionComment}",
    "color": "#205081",
    "fields": [
      {
        "title": "By",
        "value": "${actionUserLink}",
        "short": true
      },
      {
        "title": "Created by",
        "value": "${creatorUserLink}",
        "short": true
      }
    ]
  }
]

How does the correct notification format look like for Mattermost. Can you point me to the corresponding documentation?