Download my presentation 'Creating Custom Journeys with Journey Builder: Integrating Third Party Events' delivered at Salesforce Connections 2016 conference.
I've created an animated gif recording of the two methods that I used in my presentation, which you can review below.
Right-click on this link and click 'Save Link As...' to download the Postman collection that includes the Fuel REST API methods used in this session.
Download Postman from getpostman.com.
Refer to the documentation that I authored on this page. You will need to create an API Integration app.