curl --request GET \
  --url https://api.hubapi.com/events/v3/event-definitions \
  --header 'Authorization: Bearer <token>'

{
  "total": 123,
  "paging": {
    "next": {
      "link": "",
      "after": ""
    }
  },
  "results": [
    {
      "associations": [
        {
          "inverseLabel": "",
          "hidden": false,
          "allowsCustomLabels": false,
          "maxFromObjectIds": 123,
          "inverseAllowsCustomLabels": false,
          "isPrimary": false,
          "hasUserEnforcedMaxToObjectIds": false,
          "hasUserEnforcedMaxFromObjectIds": false,
          "id": 123,
          "toObjectTypeId": "",
          "inverseCardinality": "",
          "maxToObjectIds": 123,
          "hasCascadingDeletes": false,
          "fromObjectType": "",
          "toObjectType": "",
          "label": "",
          "inverseId": 123,
          "cardinality": "",
          "inverseName": "",
          "hasAllAssociatedObjects": false,
          "inverseHasAllAssociatedObjects": false,
          "fromObjectTypeId": "",
          "portalUniqueIdentifier": "",
          "isInversePrimary": false,
          "name": "",
          "category": ""
        }
      ],
      "objectTypeId": "<string>",
      "createdUserId": 123,
      "trackingType": "VISITED_URL",
      "description": "<string>",
      "primaryObjectId": "<string>",
      "comboEventRules": {
        "operationType": "AND",
        "composingRules": [
          {
            "lookbackWindowDays": 123,
            "eventTypeId": "<string>",
            "propertyFilters": [
              {
                "frameworkFilterId": 123,
                "property": "<string>",
                "filterType": "PROPERTY",
                "operation": {
                  "includeObjectsWithNoValueSet": true,
                  "defaultValue": "<string>",
                  "propertyType": "bool",
                  "operationType": "<string>",
                  "value": true,
                  "operatorName": "<string>",
                  "operator": "IS_EQUAL_TO"
                }
              }
            ],
            "count": 123
          }
        ],
        "ruleBranches": [
          {}
        ]
      },
      "fullyQualifiedName": "<string>",
      "primaryObject": "<string>",
      "labels": {
        "plural": "<string>",
        "singular": "<string>"
      },
      "archived": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "name": "<string>",
      "id": "<string>",
      "properties": [
        {
          "hidden": false,
          "displayOrder": 123,
          "description": "",
          "showCurrencySymbol": false,
          "type": "",
          "hubspotDefined": false,
          "createdAt": "2023-11-07T05:31:56Z",
          "archived": false,
          "options": "",
          "hasUniqueValue": false,
          "calculated": false,
          "externalOptions": false,
          "updatedAt": "2023-11-07T05:31:56Z",
          "createdUserId": "",
          "modificationMetadata": {
            "readOnlyOptions": true,
            "readOnlyValue": true,
            "readOnlyDefinition": true,
            "archivable": true
          },
          "sensitiveDataCategories": "",
          "label": "",
          "formField": false,
          "dataSensitivity": "",
          "archivedAt": "2023-11-07T05:31:56Z",
          "groupName": "",
          "referencedObjectType": "",
          "name": "",
          "calculationFormula": "",
          "fieldType": "",
          "updatedUserId": "<string>"
        }
      ]
    }
  ]
}