Collection resources are paginated in the API. All paginated resources are returned wrapped in an envelope with count, next, previous, and results fields:

  "count": 100, /* the total number of items across all pages */
  "next": "",
  "previous": "",
  "results": [
    /* items on page 2 of this collection */

The results field contains the items in that page. If the next field is non-null then the next page is available. If the previous field is non-null then the previous page is available.