An action is any change submitted to the voting system, such as
The author of this action is: dgenr8, 1BaKh3EaAjGoaP8BH9AZ4jG7VD3HaC3xoG
The member list that this action was made for.
The action string, which is the actual "command" part of the action:
bitcoin-unlimited-voting: 64df1fae399ccbb2db03a452926030749093f4f4df436c28a261a0ef479115b5 cast-proposal-ballot vote 67633f3ae3b6798542287f73973e4b1a66d4897845b88dbb5276d35e9b035ccd by dgenr8 answer (accept) # proposal: BUIP145
This action is part of a multi-action and only the multi-action is signed.