curl --request GET \
  --url https://api.hubapi.com/forms/v2/fields/{form_guid}

[
  {
    "name": "<string>",
    "label": "<string>",
    "type": "<string>",
    "fieldType": "<string>",
    "description": "<string>",
    "groupName": "<string>",
    "displayOrder": 123,
    "required": true,
    "selectedOptions": [
      "<string>"
    ],
    "options": [
      {}
    ],
    "validation": {
      "name": "<string>",
      "message": "<string>",
      "data": "<string>",
      "useDefaultBlockList": true,
      "blockedEmailAddresses": [
        "<string>"
      ]
    },
    "enabled": true,
    "hidden": true,
    "defaultValue": "<string>",
    "isSmartField": true,
    "unselectedLabel": "<string>",
    "placeholder": "<string>",
    "dependentFieldFilters": [
      {}
    ],
    "labelHidden": true,
    "propertyObjectType": "<string>",
    "metaData": [
      {}
    ],
    "objectTypeId": "<string>"
  }
]