I am using the following command for creating a dataset in my Azure Speech service:

spx csr dataset create --api-version v3.1 --kind "Acoustic" --name "My Custom Speech" --description "My Acoustic Dataset Description" --project $project_id --content https://xyz.blob.core.windows.net/test-and-train-data --language "en-US"

The content flag is pointing to a specific container in my storage account where the data is structured. like this

test-and-train-data
 - train.wav
 - trans.txt

I just get an error, no details. What am I doing wrong?