Hi Naisargi Baria !

To be able to get B.Tech admission 2019 to Nirma University, candidates will have to appear in JEE Main 2019 or GUJCET 2019 entrance exams.Well you got 55 percentile in your JEE MAINS examination . You should use Careers360 Rank Predictor to know your probable rank . Here is the link provided :-

https://engineering.careers360.com/jee-main-rank-predictor

And Here is the previous year cut off of Nirma University :-

Branch                                                       ITNU Merit No.           JEE (MAIN) 2017 All India Rank

Computer Science & Engineering                        426                              23293

Mechanical Engineering                                      1052                             38980

Electronics And Communication Engineering           1712                           54955

Electrical Engineering                                            1992                         62201

Chemical Engineering                                             2219                       68237

Civil Engineering                                                   2973                        89195

Instrumentation And Control Engineering                  3000                      90222

The cutoff of this year will also depend on previous year trend .

Source :- https://engineering.careers360.com/articles/nirma-university-btech-admissions