http.begin(client, url); // Start the connection
    http.addHeader("Content-Type", "application/json"); // Set content type to JSON

    // JSON data that works with curl
    String jsonData = "{\"this\":[{\"is\":{\"some\":[\"test\",\"data\"]}}]}";
    int httpCode = http.POST(jsonData); // Send the POST request

    if (httpCode == HTTP_CODE_OK) {
        String payload = http.getString();
        Serial.print("HTTP Response code: ");
        Serial.println(httpCode);
        Serial.println(payload);
    } else {
        Serial.print("HTTP Error code: ");
        Serial.println(httpCode);
        Serial.println(http.getString()); // This will print the detailed error message
    }
    http.end(); // Close the connection
} else {
    Serial.println("WiFi not connected");
}