Players request a window of tracks in your cloud queue by specifying the itemId of a track in the cloud queue, the previousWindowSize (or the number of tracks before a specified track), and the upcomingWindowSize (the number of tracks after a specified track) to be returned. This also indicates the playback policies for individual items in the cloud queue.

Optionally, the player can use this API to obtain a new access token in the response from your cloud queue server.

See GET /version for more details about the queueVersion parameter.