How to fill ACF fields using WordPress Rest-API in python

I’m trying to fill ACF Fields using WordPress Rest-Api in Python, but when I try to make request it’s giving “400 Bad Request”. I’m using ACF latest verison 5.11 that comes with in-built api integration.

This is my code, please help me to solve this problem.

import requests
import json
import base64

url = "example.com/wp-json/wp/v2/posts"

user = "exmaple@gmail.com"
password = "RIHr O7kE SCn0 LXVW xyPc jBn9"

credentials = user + ':' + password

token = base64.b64encode(credentials.encode())
header = {'Authorization': 'Basic ' + token.decode('utf-8')}
post = {
 "title"    : "Hello World",
 "type"     : "post",
 "status"   : "publish", 
 "content"  : "This is my first post created using rest API",
 "acf" : {
     "youtube_url": "https://www.youtube.com/watch?v=0outb6oSJW4"
 }
}
responce = requests.post(url , headers=header, json=post)
print(responce.status_code, responce.reason)