Hey Abhiroop ,
Greetings!

Congratulations on securing such a good rank . I would like to tell you that Computer Science Engineering  at Manipal campus is expected to close around 2000 rank  and Electronics and Communication Engineering around 5000 rank.
You have good chances of getting admission in ECE . Though , you have low chances of getting CSE.

Hope this will help . Good Luck ! You can reply to this comment if you have any further queries , I will be happy to help