An upload session — an id plus the presigned URL to PUT the raw file to. Returned both by POST /datasets (as part of the new dataset) and by POST /datasets/{datasetId}/uploads (on its own, for an existing one).
POST /datasets
POST /datasets/{datasetId}/uploads
Identifies this upload session. Pass to POST /datasets/{datasetId}/uploads/{uploadId}/finalize once the PUT completes.
POST /datasets/{datasetId}/uploads/{uploadId}/finalize
An upload session — an id plus the presigned URL to PUT the raw file to. Returned both by
POST /datasets(as part of the new dataset) and byPOST /datasets/{datasetId}/uploads(on its own, for an existing one).