Thanks this works for me. :)
I have checked other ajax requests and found that some extra parameter
server : PMA_commonParams.get('server'),
db : PMA_commonParams.get('db'),
table : PMA_commonParams.get('table'),
are passed in the ajax request. What is the need of this so that I can check if these are required in my case.
I think these are used to get the currently selected tables, database so that the operations can be performed on them. Then this is not required in my case and I can simply ignore these.