ChangeEvent

Describes the granular change of returned resource of certain resource types. Changes made through UI, API and new versions of Editor by external users (including external users, and internal users that can be shown externally) in the past 30 days will be shown. The change shows the old values of the changed fields before the change and the new values right after the change. ChangeEvent could have up to 3 minutes delay to reflect a new change.

Fields
resource_name	string Output only. The resource name of the change event. Change event resource names have the form: customers/{customer_id}/changeEvent/{timestamp_micros}~{command_index}~{mutate_index}
change_date_time	string Output only. Time at which the change was committed on this resource.
change_resource_type	ChangeEventResourceType Output only. The type of the changed resource. This dictates what resource will be set in old_resource and new_resource.
change_resource_name	string Output only. The Simply resource this change occurred on.
client_type	ChangeClientType Output only. Where the change was made through.
user_email	string Output only. The email of the user who made this change.
old_resource	ChangedResource Output only. The old resource before the change. Only changed fields will be populated.
new_resource	ChangedResource Output only. The new resource after the change. Only changed fields will be populated.
resource_change_operation	ResourceChangeOperation Output only. The operation on the changed resource.
changed_fields	FieldMask Output only. A list of fields that are changed in the returned resource.
campaign	string Output only. The Campaign affected by this change.
ad_group	string Output only. The AdGroup affected by this change.
feed	string Output only. The Feed affected by this change.
feed_item	string Output only. The FeedItem affected by this change.