Can't Add Request by API

Can't Add Request by API

Hello,
I've got an error:
  1. {
        "response_status": {
            "status_code": 4000,
            "messages": [
                {
                    "status_code": 4001,
                    "field": "TECHNICIAN_KEY",
                    "type": "failed",
                    "message": "Extra parameter(s) not allowed."
                }
            ],
            "status": "failed"
        }
    }
when I'm trying to Add Request via APIv3.

Seems like the problem is when I try to input some params like: TECHNICIAN_KEY or format json.
Im using postman for this and try via powershell to, no success.
please help
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