name: group_by
description: >-
  Field to group data by. Defaults to `track_id` if not provided where relevant.
  This parameter is used akin to a SQL `GROUP BY` clause where fewer results may be returned. For example,
  providing `group_by=isrc` will return a set of tracks containing only unique ISRCs.
in: query
required: false
schema:
  $ref: '../schemas/properties/tracks_group_by_field.yaml'