Retrieve the downloads for a project.
Project ID
Impulse ID. If this is unset then the default impulse is used.
OK
Whether the operation succeeded
Optional error description (set if 'success' was false)
"The ID of the download, if available"
"Training data"
"NPY file"
"73 items"
"/api/1/raw-data/training/x"
"The ID of the impulse associated with this download, if available"