Lyrics from memory, and I heard the song once, several days ago -- and I'm OLD. ;^)

This is my right
As given by God
To live in a land of freedom

CHORUS: Freedom
Freedom
I will fight
for the right
to live in freedom

Anyone who tries
To take this away
Will have to answer

Honestly, that's all I remember, and that may well be all there was to it. It has a simple melody and rhythm and as I said, an audience of many thousands learned it and was singing it in a matter of seconds, with much clapping and stamping of feet.