updatedAt property
UpdatedAt is unix seconds of the last status flip, server-assigned, and the key the sequence list is ordered by (newest first). Adding a step or enrolling a contact does NOT touch it — only draft/active/archived does — so it tracks activation rather than activity.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
int? updatedAt;