title: Upload via to Blob Storage using Rest API with Shared Access Signature
body: <p>I'm trying to use the Put Blob Rest API from Postman (at the moment) using also a code generated SAS.
  If I set the body as binary in postman and I select my file everything works just fine - I get my file in the blob storage as expected.
  However, if I send the file using a multipart/form-data the file is being uploaded, but I get additional data at the beginning of the file such as:
  <code>
  ----------------------------515848534032814231487294
  Content-Disposition: form-data; name="file"; filename="my_file.json"
  Content-Type: application/json
  </code></p>
  
  <p>Does anybody know why is that and how I could use multipart/form-data for uploading my file to the blob storage?</p>
  
  <p>Thank you in advance!</p>