json.meta do
  json.labels @conversation.label_list
  json.additional_attributes @conversation.additional_attributes
  json.contact @conversation.contact.push_event_data
  json.assignee @conversation.assignee.push_event_data if @conversation.assignee.present?
  json.agent_last_seen_at @conversation.agent_last_seen_at
end

json.payload do
  json.array! @messages do |message|
    json.id message.id
    json.content message.content
    json.inbox_id message.inbox_id
    json.conversation_id message.conversation.display_id
    json.message_type message.message_type_before_type_cast
    json.content_type message.content_type
    json.created_at message.created_at.to_i
    json.private message.private
    json.source_id message.source_id
    json.attachments message.attachments.map(&:push_event_data) if message.attachments.present?
    json.sender message.sender.push_event_data if message.sender
  end
end