Update a user's shopping cart items

Update the <code>shoppingCartItems</code> field on the user profile with shopping cart items. User profile is updated if it already exists (created otherwise) via the user field. Types of data fields must match the types sent in previous requests, across all data fields in the project.<br/><br/>Learn about <a href="https://support.iterable.com/hc/articles/29156459027348">identifying users by <code>userId</code> and <code>email</code></a>.