如何从嫩薄荷GET文本响应中解码base64

Question

I queried a transaction result using:

http://localhost:26657/tx?hash=0x43B8422E9FD4FD4A01213772E989CDA5F36103A0EA679B95932052B20C016267

and then fetch the transaction content 'tx' in the returned JSON object.

rgEoKBapCjZS59jqCgpnb29nbGUuY29tEg4KCW5hbWV0b2tlbhIBNRoUr67sqicZ8wXbWkNLD8E6c0TGM/YSBBDAmgwaagom61rphyEC6ICqudQCIugpL8NEvi6Fblxk+ZB+51T+NUDg0WdMQCUSQG0z4HhxINONIjPcQc/GDyVOjU9CRovZaT3GxcekSvN6SBQx94xgwMkq7EqivCxSqYB/TDC0Gp5Z/6z2+Z4Km3k=

I decoded this with

base64.StdEncoding.DecodeString(base64Str)

and then it printed the following result

�((� 6R���

google.com ┼▒└␊├⎺┐␊┼5���'��ZCK�:sD�3��� j &�Z�!耪��"�)/�D�.�n\d��~�T�5@��gL@%@m3�xq Ӎ"3�A��%N�OBF��i=��ǤJ�zH1��`��*�J��,R��L0��Y����� �y

What's the correct way to decode a transaction?