httpclient postasync binarydata with json values

Question

i need to pass binarydata with json values

 

public async Task<HttpResponseMessage> PostDocuments()

{

var client = new HttpClient();

var url = CoreCommon.GetAppSetting("DRS_API_BASE") + "v1/Documents";

HttpResponseMessage response = client.PostAsync(url, Request.Content).Result;

return response;

}

 

i have tried this code but getting 500 error in postman

 

{

"message":"For input string: \"??""A"µ"S8}\"",

"data": null

}