@riddifinsoft Thanks, we figured out problem. We were sending incorrect data. The example given in Node.js on Right side is wrong on your site. You may wanna fix that.
Correct Request Data is

{
                    "exchange": "NSE",
                    "tradingsymbol": "BIOCON-EQ",
                    "symboltoken":11373
                    }

Sending Correct Headers as request is accepted.
Request Data: (This is token for Adani Power as per the JSON File)

{
                    "symbol_token":17388
                    }

Response : Getting Symbol Not Found But symbol is correct

{"readyState":4,"responseText":"{\"message\":\"Symbol Not Found\",\"errorcode\":\"AB1009\",\"status\":false,\"data\":null}","status":200,"statusText":"parsererror"}