Name: voting-comments-request
Type: request
Purpose: >
  Instructs the server to collect all comments received for a particular voting
Response: voting-comments
Inherits: message
Elements:
  Signature: { required: true }
  From: { required: true }
  Event-Id: { required: true, type: identifier, class: event }
  Voting-Id: { required: true, type: identifier, class: voting }
Rejection-Codes:
  31: Sender is not authorized to request vote count
  41: Event does not exist
  42: Voting does not exists
  43: Voting has not ended yet