Track a purchase

Track purchase events. <code>shoppingCartItems</code> field on the user profile is cleared. User profile is also updated if it already exists (created otherwise) using the user request field. Also, note that there is a soft limit on the number of unique fields a user can have (default is 1,000). 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>.