Perform the following steps to track payload fields in messages during runtime:
In the Create Order Integration page, click Tracking.
The Business Identifiers For Tracking dialog appears.
From the Available Source Fields section, expand the BusinessEvent_Input node, then the InputParameters node, and then the BusinessEvent node.
Drag and drop the Event Key element to the Tracking Field column in the table as the primary Tracking field.
Save your work and then click Exit Integration.