def post_blob_url(url)
      raise ArgumentError.new("Invalid blob URL #{url}") unless URI.parse(url).scheme =~ /^https?/
      request 'POST', "blobs", {
        query: { "blobUri" => url },
      }
    end
def post_blob_url(url)
      raise ArgumentError.new("Invalid blob URL #{url}") unless URI.parse(url).scheme =~ /^https?/
      request 'POST', "blobs", {
        query: { "blobUri" => url },
      }
    end
create blob record by external url