How can I upload Array of objects to api with MultipartRequest in flutter?

I should upload these type of data to api

How to upload Array of objects using MultipartRequest? Object should consist of {"image" : image}

{
  "files: [
     {"image" : "fileeeeeee"},
     {"image" : "fileeeeeee"},
     {"image" : "fileeeeeee"},
  ],
  "title": "string",
  "owner": id
}