Facing error as Invalid Data while recording Payments for vendors

Hi I am trying to record vendor payments via API I followed everything with respect to documentation but still facing this response as

{

    "code": 6,
    "message": "Invalid data provided"
}

My input JSON string is 
{
    "vendor_id": "2062398000000164580",
    "bills": [
        {
            "bill_id": "519558000001167001",
            "amount_applied": 3754,
        }
    ],
    "date": "2018-06-19",
    "amount": 3754,
    "paid_through_account_id": "2062398000000073383",
    "payment_mode": "Bank Transfer",
    "description":"INF/xxxxxxxx4281/Rx Solutions",
    "reference_number": "S22440650"
}

please help me ASAP