An action is any change submitted to the voting system, such as
The author of this action is: theZerg, 1zerg12nRXZ41Pw4tfCTqgtdiJx6D1We3
The member list that this action was made for.
The action string, which is the actual "command" part of the action:
bitcoin-unlimited-voting: 4e6471c8af35dbd4866895c2d40fd22738ccfcebe5feca6dd96d0e9896851ec7 cast-proposal-ballot vote da24b05bf0ce4d09607ece88773689a410615ba268dc387c4678c24a4499a835 by theZerg answer (accept) # proposal: BUIP109
This action is part of a multi-action and only the multi-action is signed.