An action is any change submitted to the voting system, such as
The author of this action is: imaginary_username, 1KNvUAmquf9v2BgyrTsLjE8GdKwu1PaJed
The member list that this action was made for.
The action string, which is the actual "command" part of the action:
bitcoin-unlimited-voting: 5776292860f8c233038833f18c8d4eaaab686efc9dc721265df14d3fde9f2efb cast-member-ballot name singularity_ address 3H2kn2poN76VeH5G4UPd3kxdRny3NEyU9n by imaginary_username answer accept
Signature:
IJnS1HTiXkIw4bGPc5f5JSkZ4ShSqNH9CcvF6nUKmd2Cbh/erbLgswLCU5PZhn7JHNOJF8M+3pQXGj18ynjjAqs=
This signature is the base64-encoded Bitcoin-signature of the above action string, signed with this action author's Bitcoin address.