updatedAt property
UpdatedAt is when the subject's own fields last changed, Unix seconds. A check moving to a new status does not touch it — that history lives on the check.
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;