You can easily export your Attendee Summary Report from Eventbrite by taking the following steps:
Step 1: Go to your Manage page and select your event.
Step 2: Select Event Reports (under Reports).
Step 3: Select the Attendee Summary report (under Common Reports).
Step 4: Customize your Attendee Summary report.
Step 5: View your Attendee Summary report.
Step 6: Edit attendee information and order information.
Step 7: Choose a file type to download.
Import to Nimble
Click your avatar in the top right hand corner
Choose Networks & Imports
From here, use the Import Wizard to upload your file.
For more information about this feature, please take a look at the following: