tssPubKey.toString("base64") is returning string in the format below
"151,204,165,141,226,194,173,159,241,182,25,4,224,242,100,86,48,161,37,250,239,236,228,210,84,196,26,128,177,210,204,60,22,217,37,190,164,92,184,50,133,42,164,242,38,8,209,229,108,145,78,193,171,242,0,175,17,124,49,27,118,237,74,67"
tssPubKey.toString("base64") is returning string in the format below
"151,204,165,141,226,194,173,159,241,182,25,4,224,242,100,86,48,161,37,250,239,236,228,210,84,196,26,128,177,210,204,60,22,217,37,190,164,92,184,50,133,42,164,242,38,8,209,229,108,145,78,193,171,242,0,175,17,124,49,27,118,237,74,67"
instead of base64 format