curl --request GET \
  --url https://api-dev.iclosed.io/customFields/searchContactCustomField \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": 123,
      "name": "<string>",
      "identifier": "<string>",
      "description": "<string>",
      "inputType": "<string>",
      "options": "<string>",
      "type": "<string>",
      "defaultStatement": "<string>",
      "CustomFieldAssociation": [
        {
          "id": 123,
          "customFieldEventId": 123,
          "customFieldId": 123,
          "eventCallId": 123,
          "CustomFieldAnswer": [
            {
              "answer": "<string>",
              "type": "<string>"
            }
          ]
        }
      ]
    }
  ]
}