curl --request GET \
  --url https://api.hubapi.com/properties/v1/deals/properties/named/{property_name}

{
  "name": "<string>",
  "label": "<string>",
  "description": "<string>",
  "groupName": "<string>",
  "type": "string",
  "fieldType": "textarea",
  "options": [
    {
      "description": "<string>",
      "label": "<string>",
      "value": "<string>",
      "displayOrder": 123,
      "hidden": true,
      "readOnly": true,
      "doubleData": 123
    }
  ],
  "displayOrder": 123,
  "formField": true,
  "readOnlyValue": true,
  "readOnlyDefinition": true,
  "hidden": true,
  "mutableDefinitionNotDeletable": true,
  "favorited": true,
  "favoritedOrder": 123,
  "calculated": true,
  "externalOptions": true,
  "displayMode": "<string>",
  "hubspotDefined": true,
  "createdAt": 123,
  "updatedAt": 123,
  "createdUserId": 123,
  "updatedUserId": 123
}