An action is any change submitted to the voting system, such as
The author of this action is: Peter_R, 1BWZe6XkGLcf6DWC3TFXiEtZmcyAoNq5BW
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 4cfd475888bb64fb722db66a302959e1176ff87ac37efcebda05a563c52f2b7a by Peter_R answer (accept)
Signature:
H8+rsFUa2hLkxOkueJlQZboEv+pB92yFnm0V7x8N+t4QAmjzKzffK6nm2z7mvMeFbtIfe/32wE/HWr2U1t5neAc=
This signature is the base64-encoded Bitcoin-signature of the above action string, signed with this action author's Bitcoin address.