upload.ps1

param(
[uri] $sasUrl,
[string] $path,
[string] $container = 'signing-upload'
)

$filename = split-path -leaf $path
$newurl=[System.UriBuilder]::new($sasurl)
$newurl.path="/$container/$filename"

Invoke-WebRequest -Uri $newurl.Uri -Method Put -ContentType application/octet-stream -Headers @{
   'x-ms-version'='2018-03-28'
   'x-ms-blob-type' = 'BlockBlob'
} -InFile $path