The extra column needs to be add is i.e. "Duration" that can be extracted from StartTime and EndTime. Start date and end date is in Unix epoch time that needs to be converted into human readable format. Please help
Your example doesn't have the outer JSON field, so I added that in order to extract the array elements as a multivaliue field which could expanded (mvexpand) - you may be able to extract this more easily from your real data.
Your epoch times are in milliseconds not seconds as normal, so I converted those before calculating the duration and formatting for readability