Name: event-participant-details-request
Type: request
Purpose: >
  Request detailed information about a participant regarding a specific event
Response: event-participant-details
Inherits: message
Elements:
  Signature: { required: true }
  From: { required: true }
  Participant-Id: { required: true, type: identity }
  Event-Id: { required: true, type: identifier, class: event }
Rejection-Codes:
  22: Event does not exist
  41: Participant not hosted on this machine
  42: Unknown participant