[Swift 3]How to send non dictionary body

I am facing a issue while POST and PUT requests. By default Swagger expects a body as dictionary type. I have requests where i have to send json array, String etc. For example this is one sample method which got created while generating

open class func FunctionName(lbid: Int64, lasid: Int64, luid: Int64, lcasid: Int64? = nil, lupid: Int64? = nil, ptype: String? = nil, cform: Bool? = nil, csform: Bool? = nil, body: [SomeModel]? = nil) -> RequestBuilder<SomeResponseObject> {
        let path = "<some path>"
        let URLString = SwaggerClientAPI.basePath + path
        let parameters = body?.encodeToJSON() as? [String:AnyObject] -----> This line has a problem
 
        let convertedParameters = APIHelper.convertBoolToString(parameters)
 
        let requestBuilder: RequestBuilder<SomeResponseObject>.Type = SwaggerClientAPI.requestBuilderFactory.getBuilder()

        return requestBuilder.init(method: "POST", URLString: URLString, parameters: convertedParameters, isBody: false)
    }

When encodeToJson() method is called it is expecting result to be of dictionary type but I had to pass array here as seen in method signature. When i send array, String parameters is becoming nil. How can i send array without disturbing Swagger code(because new methods will be added and I don't want to change everytime I generate Swagger code). Can I somehow pass my request object directly which will avoid this situation?

Start with the generated Swift method shown in the issue and trace the body through encodeToJSON(), convertBoolToString(), and RequestBuilder initialization. Reproduce the request with an array or string body and determine whether the generated client preserves it; done means non-dictionary bodies are sent without manual edits to newly generated methods.