An action is any change submitted to the voting system, such as
The author of this action is: lunar, 1BpYYT2HQzQdz5CFPM1nehCZd1xWPtNbma
The member list that this action was made for.
The action string, which is the actual "command" part of the action:
bitcoin-unlimited-voting: 242bbdbc67846623368b9d1fae050d6815f1942093617033be4db57ffe21c9e0 cast-proposal-ballot vote dee277b0eb30ef5052ddbbe5504e97f82935a9378f17fdab041bd7e10ca87ae6 by lunar answer (accept)
Signature:
IKDxscEnV7e8EP6HB77OgyDH/TY4iOwlfvu8/Zj8b3RBCUXRGFlO8H6OMbXVPTSC46zmMzBWMH7lZ9EMuQFAyKE=
This signature is the base64-encoded Bitcoin-signature of the above action string, signed with this action author's Bitcoin address.