This endpoint creates a lidarannotation task. In this task, one of our Scalers view outputs from a series of LIDAR frames, along with optional radar and camera data, and annotate where different objects exist in the 3D space with 3D cuboids. The required parameters for this task are attachments, labels, and attachment_type. The callback_url is the URL which will be POSTed on task completion, and is described in more detail in the Callback section. The attachments will be a list of links to external JSON files, each following the definition of a Frame as specified below.