.
=item Storage.S3.UploadPolicySignature (required)
The signature of the Base64 encoded JSON document.
JSON Parameters: (all are required)
expiration - The expiration of the policy. Amazon recomme user's behalf.
=item s3_policy_upload_signature (required)
The signature of the Base64 encoded JSON document.
=item bundle_error_code (optional)
Error code for bundle failure.
=item bundle_error