["type" => "mandatory"], "token" => ["type" => "mandatory"], "number" => ["type" => "mandatory"], "nameOnCard" => ["type" => "mandatory"], "expiryMonth" => ["type" => "mandatory"], "expiryYear" => ["type" => "mandatory"], "startMonth" => ["type" => "optional"], "startYear" => ["type" => "optional"], "issueNumber" => ["type" => "optional"], "cardDescription" => ["type" => "optional"], ]; }