Cleeng offer ID in a short format (without a country suffix).
Offer title, up to 255 characters.
Offer description, up to 255 characters. Example: Best deal!
Two-letter country code of offer localization.
Offer price. The offer price may be equal to zero. If it is above zero, it must be higher than the set minimum price (the minimum price differs per offer type and currency).
geoRestriction might be object or null (when disabled). If geoRestriction is an object, then type or countries are required.
Used only in 'subscription' offer type.