An action is any change submitted to the voting system, such as
The author of this action is: kyuupichan, 1BH8E3TkuJMCcH5WGD11kVweKZuhh6vb7V
The member list that this action was made for.
The action string, which is the actual "command" part of the action:
bitcoin-unlimited-voting: ba0411a9e0c7f210c553a4272e3d1fb78bad93c5a59d6f8ae566287f151921ad cast-proposal-ballot vote c4f176fad6b4ed997242aef895343d2e3cbb8f8964264278fbb71ab51b01ada0 by kyuupichan answer (accept)
Signature:
IMyxZJGXtkjFnsWsQHZkqn2npNHvMFwLGl24xj/pTlCmH0h3RRjH6EkvoGCLTtFR/+Omf0e9onR+LmvO3UAvPxg=
This signature is the base64-encoded Bitcoin-signature of the above action string, signed with this action author's Bitcoin address.