Return in correct json format

[DeaD_EyE]

This is a Python dict. The Python dict can converted with json.dumps(your_dict) to a json-string.

If you use flask:

from flask import jsonify

# your code

@app.route('/')
def root():
    message = {
        'statusCode': 200,
        'headers': {'Access-Control-Allow-Origin': '*',
        'Content-Type': 'application/json'},
        'body': {'message': 'Successfully inserted'}
    }
    return jsonify(message)

The jsonify function sets also the right content type in the headers.
Other frameworks have also helpers for this task.