I'm trying import data to zabbix server using python3 with requests module.

I'm using standart method "configuration.import".

Steps to reproduce:

body = {"jsonrpc": "2.0", "method": "configuration.import", "params": group_params, "id": 1, "auth": auth_key}

requests.request('POST', url, json=body)

where "group_params" is dict with data correctly formatted (if I try to import other objects like hostgroups etc. I have no problems) 

tcpdumped request on server-side

Result:
Answer from server api:

b'{"jsonrpc":"2.0","error":

{"code":-32602,"message":"Invalid params.","data":"Invalid parameter \\"/source\\": a character string is expected."}

,"id":1}'

But there is no "/source" string in request.

tcpdumped response from server:

Expected:
Correct import