400

{
  "type": "/event-center/error-types/constraint-violation",
  "title": "Constraint violation",
  "status": 400,
  "errors": [
    {
      "type": "/event-center/error-types/constraint-violation",
      "title": "Constraint violation",
      "detail": "end must not be null",
      "path": "end",
      "value": null
    },
    {
      "type": "/event-center/error-types/constraint-violation",
      "title": "Constraint violation",
      "detail": "start must not be null",
      "path": "start",
      "value": null
    },
    {
      "type": "/event-center/error-types/constraint-violation",
      "title": "Constraint violation",
      "detail": "name must not be blank",
      "path": "name",
      "value": null
    }
  ]
}