Cannot Figure out GO payload for XC Volterra API

I don’t know Go well, so I can’t tell where the error is happening. I’m not sure if the return type is from the Go program or from the XC API. By my likely very wrong assumptions and converting to python to understand and then reconverted back to go, perhaps some more robust json handling before the request would help? Here's what I got from chatGPT:

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"reflect"
)

func main() {
	// Example JSON input (replace this with your actual JSON string)
	jsonString := `{"key1": "value1", "key2": {"nestedKey": "nestedValue"}}`

	// Debug: Print the JSON structure
	fmt.Println("JSON String:", jsonString)

	// Create a bytes buffer for the payload
	payload := bytes.NewBuffer([]byte(jsonString))

	// Print the type of payload
	fmt.Println("Type of payload:", reflect.TypeOf(payload))

	// Try to decode the JSON into a map
	var data map[string]json.RawMessage
	err := json.Unmarshal([]byte(jsonString), &data)
	if err != nil {
		fmt.Println("Error unmarshaling JSON:", err)
		// Handle other JSON types if needed
		// Example: if the JSON is a string
		var simpleString string
		err = json.Unmarshal([]byte(jsonString), &simpleString)
		if err == nil {
			fmt.Println("JSON is a simple string:", simpleString)
		} else {
			// Handle additional cases as needed
			fmt.Println("Unhandled JSON structure:", err)
		}
		return
	}

	// Successfully unmarshaled into a map
	fmt.Println("Parsed JSON data:", data)

	// Create an HTTP request
	apiURL := "https://example.com/api" // Replace with your actual API URL
	req, err := http.NewRequest(http.MethodPost, apiURL, payload)
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}

	// Debug: Print the request
	fmt.Println("HTTP Request created:", req)
}