{"query":"mutation UpdateMeeting($input: UpdateMeetingInput!) {
  updateMeeting(input: $input) {
    __typename
    _deleted
    _lastChangedAt
    _version
    date
    dateTime
    id
    name
    time
    timestamp
  }
}
",
"variables": {
    "input": {
      "date": "2001-02-03",
      "dateTime": "2001-02-03T01:30:15Z",
      "name": "meeting1",
      "id": "45a5f600-8aa8-41ac-a529-aed75036f5be",
      "time": "01:22:33",
      "timestamp": 1234567890,
      "_version": 1
    }
  }
}