Use typed query param fields. Supports both comma-separated values (fields=name,title) and repeated params (fields=name&fields=title).
1 - 20 elementsname, languageCode, storeCode, title, phoneNumbers, categories, storefrontAddress, websiteUri, regularHours, specialHours, serviceArea, labels, adWordsLocationExtensions, latlng, openInfo, metadata, profile, relationshipData, moreHours, serviceItems 200