As @Greenreader9 said, our cron tool can only be used to call URLs, not system commands.
Fortunately, your cron job executes the command wget, which calls URLs. So we should be able to convert that command into something that works here.
The URL being called by wget is https://soundfex.com/runtasks?token=123974460089f349ca2e.
So by removing the first part of the URL, you should be able to add a cron job with the value /runtasks?token=123974460089f349ca2e, which should do the exact same thing as the prescribed command does.