About the example Azure Storage Blob CRUD with MSI

Could someone please explain a better examples with CRUD and Msi (deep dive policies) ? What if if I need handle a file of different type ( not json object) ? What about to send this file to blob ? I`m trying to get a file from a S3 (via get API) and write this to an blob storage.
I can Get data from S3 using send request, otherwise when I try sent that to Blob storage is generated an error because the type of file isn't a pure json object:
`
https://{{storage}}.blob.core.windows.net/container
POST

2019-07-07


BlockBlob


file

@($"{((IResponse)context.Variables["**blobdata**"]).Body.As() }")

`
Here I`m trying send "blobdata" because is the variable that contains the file from the first Send-Request ( not presented here). The error I received is following:

`"Expression evaluation failed. The message body is not a valid JSON. Unexpected character encountered while parsing value: P. Path '', line 0, position 0.\r\n at Newtonsoft.Json.JsonTextReader.ParseValue()\r\n at Newtonsoft.Json.Linq.JObject.Load(JsonReader reader, JsonLoadSettings settings)\r\n at Microsoft.WindowsAzure.ApiManagement.Proxy.Gateway.MessageBody.AsJObject(Stream stream, Encoding encoding, JsonSerializerSettings settings)\r\n at Microsoft.WindowsAzure.ApiManagement.Proxy.Gateway.MessageBody.As[T](Boolean preserveContent)",
"Unexpected character encountered while parsing value: P. Path '', line 0, position 0."`

No repository files or tests are named; start with the embedded send-request policy and the response variable from the first request, then reproduce the non-JSON body error. Done means a documented Azure API Management example covering CRUD, managed-identity policies, and transferring an arbitrary file from S3 to Azure Blob Storage.

Written by the indexing model from the issue text.