Clean up event API calls

[jtorreggiani]

PR Overview

Type of contribution

• [X] Code
• [ ] Documentation

Reference: Issue or Pull Request (PR)

• [ ] Towards https://github.com/data-umbrella/event-board-web/issues/386

Description of Changes

Cleans up the event API calls to prevent attributes from getting stripped out on submission.

Before and After for UI Updates

N/A

For PR Reviewer

• [ ] Does this file change the yarn.lock, package.json or package-lock.json file? If so, why?
• [ ] If this pr contains mobile and desktop changes, did you test on IphoneXr and desktop views?
• [ ] Does this file match the related tickets linked figma file, or does it pass the visual smell test?
• [ ] If this file contains javascript, does the javascript pass the smell test?
• [ ] If you don't feel super confident in your review, did you assign someone more senior to double check?