How to correctly make Create DM request in Discord API?

I am trying to create dm

import requests
import json

url = 'https://discordapp.com/api/v6/users/@me/channels'
token = 'token'
body = {
    'recipient_id': '123456789'
}

data = {'data':json.dumps(body)}
headers = {
    "Authorization": token,
    "Content-Type":"application/json"
}

r = requests.post(url, data=data, headers=headers)
print(r.content)
print(r.text)

This code receives response with “400: Bad request” message. I’ve read this but I can’t find any examples of correct usage of this request.

Answer

I finally understood my mistake, I shouldn’t pass dictionary as data but should pass a str, so I changed data=data to data=json.dumps(data) and it worked