@type t() :: %Railsr.Types.CardRule{
  card_id: String.t() | nil,
  country_list: [String.t()] | nil,
  created_at: String.t() | nil,
  limit_amount: non_neg_integer() | nil,
  limit_currency: String.t() | nil,
  limit_interval: String.t() | nil,
  mcc_list: [String.t()] | nil,
  rule_id: String.t() | nil,
  rule_type: String.t() | nil
}