{ "id": "<ID of the registration (integer)>" }

[
  { 
    "event_id": "<Id of the event (integer)>",
    "event_name": "<Name of the event>",
  }
]

[
  { 
    "event_id": "<ID of the event (integer)>",
    "event_name": "<Name of the event>",
  }
]

{ "modified": "<whether the action resulted in any modification (bool)>" }

{ "modified": "<whether the action resulted in any modification (bool)>" }

{ "modified": "<number of removed participants (integer)>" }

{
  "organizer_id": "<organizer ID that can be passed as last_organizer_id>",
  "user_id": "<central ID (integer)>",
  "user_name": "<user name>",
  "roles": [ "creator", "organizer", ... ],
  "user_page": {
      "path": "<url to the user page",
      "title": "<url text for the user page link> ",
      "classes": "<css classes for the user page link generated by core>"
  },
}

{
  "participant_id": "<participant ID that can be passed as last_participant_id>",
  "user_id": "<central user ID>",
  "user_registered_at": "<timestamp, in TS_MW format>",
  "user_registered_at_formatted": "<human-readable timestamp, formatted according to the user preferences>",
  "private": "<bool, whether the participant has registered privately>"
}

{
  "user_name": "<user name>",
  "user_page": {
      "path": "<url to the user page",
      "title": "<url text for the user page link> ",
      "classes": "<css classes for the user page link generated by core>"
  }
}

{
  "id": "<ID (integer)>",
  "name": "<name>",
  "event_page": "<event page title, prefixed with the localized namespace>",
  "event_page_wiki": "<ID of the wiki where the event page is located (string)>",
  "chat_url": "<url>",
  "tracking_tools": [
    {
      "tool_id": "<ID of the tool>",
      "tool_event_id": "<ID of the event within that tool>"
    }
  ],
  "status": "<status>",
  "timezone": "<TZ of the event, in any format accepted by PHP's DateTimeZone>",
  "start_time": "<timestamp in MW format, local time>",
  "end_time": "<timestamp in MW format, local time>",
  "online_meeting": "<whether the event is online (bool)>",
  "inperson_meeting": "<whether the event is in-person (bool)>",
  "meeting_url": "<url>",
  "meeting_country": "<country>",
  "meeting_address": "<address>",
  "questions": "<array with the IDs of enabled participant questions (integers)>"
}

{
  "private": "<whether you are registered privately (bool)>",
  "answers": [
    "<question ID (integer)>": [
      "option": "<chosen option (integer)>",
      "text": "<additional text>",
    ]
  ]
}

{
  "<question ID (integer)>": {
    "name": "<human-readable name of the question>",
    "type": "<type of the question, one of 'radio', 'select', and 'text'>",
    "label": "<localized label of the question>",
    "options <(optional, only for radio and select)>": {
      "<localized text of the option>": "<corresponding value (integer)>"
    },
    "other-options <(optional, and can only be present for radio and select types)>": {
      "<option value for which this option is accepted (integer)>": {
        "type": "<type of the option, can only be 'text'>",
        "label": "<localized label of the option>"
      }
    }
  }
}