form:
  fields:
    address:
      fields:
        user.address: { type: text, label: Address, name: user.address }
        user.zip: { type: text, label: 'ZIP code', name: user.zip }
        user.city: { type: text, label: City, name: user.city }
        user.country: { type: text, label: Country, name: user.country }
