How do I log a string in smali without its obfuscated function?

Question

I'm reversing engineering an app and after analyzing with man-in-the-middle, I find that it obfuscates its messages to the server so it looks like a gibberish.

String stc = ("msg=" + URLEncoder.encode(m20b.m60c(C22d.f54b), "UTF-8"));

the fuction which obfuscates the messages is m20b.m60c and I need to log the string to the console without it. The problem is that the editable code is in Smali, a very difficult lower level language. Everything I tried so far made the app crash.

...

invoke-direct {v1}, Ljava/lang/StringBuilder;-><init>()V

    const-string v2, "msg="
    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    sget-object v2, Lc/b/a/a;->b:Ljava/lang/String;

    invoke-static {v2}, Lc/b/a;->c(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v2

    const-string v3, "UTF-8"

    invoke-static {v2, v3}, Ljava/net/URLEncoder;->encode(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;

    move-result-object v2

    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    new-instance v2, Ljava/lang/StringBuilder;

    invoke-direct {v2}, Ljava/lang/StringBuilder;-><init>()V

    invoke-virtual {v2, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;