Create A Zapier App For Uploading Facebook custom audiences

Hi, I want to create a Zapier app that will create and update a facebook custom audience based upon a ManyChat trigger where a tag is added. I want the Zapier app to have two actions: Add to custom audience and remove from custom audience. The app should also have input fields for the 15 different custom audience identifiers that you can use in Facebook such as name, email and more importantly Facebook Page User ID. This is a small project for someone who knows how to create a zapier app.