Retrieve an event

{  "id": "string",  "calendarId": "string",  "name": "string",  "description": "string",  "dates": {},  "frequency": {    "type": "string",    "periodicity": "string",    "counter": 0,    "days": [      0    ],    "endDate": "string",    "monthlySelection": "string"  },  "roomStatus": "live",  "onPremise": {},  "live": {},  "createdAt": "string",  "updatedAt": "string",  "parentId": "string",  "owner": {},  "guestNumber": 0,  "coHostNumber": 0,  "courseTeacherNumber": 0,  "courseAttendantNumber": 0,  "courseObserverNumber": 0,  "updatedBy": "string",  "createdBy": "string",  "entity": {},  "sharedCalendars": [    "string"  ],  "attachments": [    {}  ],  "endDateReference": {},  "chapterSummary": {},  "hostMembers": [    {}  ],  "guestMembers": [    {}  ],  "coHostMembers": [    {}  ],  "courseTeacherMembers": [    {}  ],  "courseAttendantMembers": [    {}  ],  "courseObserverMembers": [    {}  ],  "cycleId": "string",  "sharedLectureIds": [    "string"  ],  "color": "string",  "links": [    {}  ],  "isConvergentWithDraftCalendar": true,  "role": "host",  "sharedCalendarsCount": 0,  "suspend": true,  "isRescheduled": true,  "isAdjustable": true,  "rescheduledDate": {},  "subject": {},  "rescheduledEventId": "string",  "originalEventId": "string",  "originalDate": {},  "books": [    {      "pageRanges": [        {          "start": 0,          "end": 0        }      ],      "id": "string",      "libraryId": "string",      "title": "string",      "sourceType": "pdf",      "courses": [        "string"      ],      "calendars": [        "string"      ],      "owner": {        "id": "string",        "name": "string",        "picture": "string",        "email": "string"      },      "createdAt": "string",      "updatedAt": "string",      "languageId": "string",      "language": {},      "thumbnail": {},      "isbnThumbnailUrl": "string",      "isbn": "string",      "library": {        "id": "string",        "title": "string",        "icon": "string",        "color": "string"      },      "numberOf": {},      "description": "string",      "file": {},      "link": {},      "edition": "string",      "publisher": "string",      "author": "string",      "createdBy": "string",      "updatedBy": "string",      "companionVolumeType": "string",      "companionVolumeIds": [        "string"      ],      "companionVolumes": [        {          "id": "string",          "title": "string",          "sourceType": "pdf",          "languageId": "string",          "thumbnail": {},          "author": "string",          "edition": "string",          "publisher": "string",          "file": {},          "link": {},          "companionVolumeType": "string",          "description": "string",          "isbn": "string",          "isbnThumbnailUrl": "string",          "libraryId": "string",          "numberOf": {}        }      ],      "isCompanionVolume": true,      "subjects": [        {          "id": "string",          "title": "string",          "color": "string",          "teachers": [            {              "id": "string",              "invited": true,              "fullName": "string",              "picture": "string",              "cover": "string",              "isFollowing": true,              "online": true,              "email": "string",              "story": {},              "organizationRole": "organization-owner",              "areaOwner": {},              "declined": true            }          ],          "courses": [            "string"          ],          "area": "string",          "numberOf": {},          "attachments": [            "string"          ],          "books": [            "string"          ],          "createdAt": "string",          "updatedAt": "string",          "createdBy": "string",          "updatedBy": "string",          "icon": "string",          "levels": [            {              "id": "string",              "title": "string",              "books": [                "string"              ]            }          ]        }      ],      "documentId": "string"    }  ]}