Click on "Developer" in the left navigation bar in the console to bring up your Integration Health page.
Scroll down to find the events you send, and any errors that need to be fixed. Click on any of the bars in a graph to see examples of the events.
You can expand any event to see what it contained.
You can also click on a user's id in blue to visit their page. On a user's page, You can click on their Activity section to see the events that were sent for them in particular.