dns_manager.rb

    def params(action:, domain:, target:, type:)
      body = {
        change: {
          :action                      => action,
          "resource-record-set"        => {
            :name             => domain
          }
        }
      }.tap do |b|
        case type
        when "CNAME"
          b[:change].merge!(
            :type              => "CNAME",
            :ttl               => "600",
            "resource-records" => [
              {
                value: target
              }
            ]
          )
        when "ALIAS"
          b[:change].merge!(
            :type              => "A",
            "alias-target"     => {
              "dns-name"               => target,
              "evaluate-target-health" => false
            }
          )
        end
      end
    end