I am not able to POST data on to third party application using server script

Integration
1

I am not able to parse my json data on third party application by using frappe.make_post_request. At that time it shows 400 Client error:
response = frappe.make_post_request(url=url, auth=None, headers = headers, data = payload)
I am not able to understand in which form Json data should be given on payload.

2

@Pritesh_pawar have u found solution …? Plz let me know i have same issue