Integrate PayPal adaptive payments API into Angular JS SPA

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Hi there, I am a front-end dev looking to integrate PayPALs adaptive payments API (spefically the delayed chained payment) into my web application. It is built with Angular and Express JS, but the Express layer is simply a thin layer to render the Single Page Application as I am much less experienced on the backend. I would learn how to do this myself but this is quite urgent and needs to be done ASAP. I want to be able to set up PayPal so that anyone can pay for a particular item and set up the delayed chain payment both to our company and then to the seller of the item as in a marketplace.