Name: issue-service-update-request
Type: request
Purpose: >
  Updates issue service by fetching current data from voting server
Response: issue-service-details
Inherits: message
Elements:
  Signature: { required: true }
  From: { required: true }
  Issue-Service-Id: { required: true, type: string, min_length: 3, max_length: 128 }
Rejection-Codes:
  31: Sender is not authorized to update issue service
  41: Issue service does not exist
  42: Could not fetch event data from voting server
  43: Issue service is up-to-date