piwikTracker.trackGoal(id, revenue, data) how to retrieve data from piwik database?

Hello! I have question. Piwik has function for create manual goal by using piwikTracker.trackGoal(), this function has 3 options, id of goal, revenue, and data. I send some data as JSON. Can I retrieve this data from piwik database, and how I do this?

This parameter is there for custom plugins, but the data is not recorded automatically. It might be in a future release, but not yet implemented.