OptionalactionThe type of action: create, update, or delete.
OptionalactorThe actor who made this change (slim representation): a member:slim, or a vcs-identity:slim for changes driven by an external VCS identity. Null when no actor can be resolved.
Values that were added.
The attribute that was changed.
The story that was changed (slim representation).
Values that were removed.
When this change occurred.
The unique identifier for the transaction.
A single history change entry.