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: be3c66388058cc34d9e899e516e8ed808b294bb3d567008f12727ed5d8b5e3c0 cast-member-ballot name mkomaransky address 1BaZbcPGhRR96j8g6LXUDjuuDtywAutm4F by Peter_R answer accept
Signature:
H5tvBRUFTo+/i6NLOJO/p5c2kwV1ntw6fJQMTNTeGZUGO1v5BJFF5vp0u2aMu/RBPJ2kfGYKRzhGOXqNaa9cBkg=
This signature is the base64-encoded Bitcoin-signature of the above action string, signed with this action author's Bitcoin address.