{
    "paymentProvider" : "PAYPAL",
    "notifyType" : "NOTIFY-PURCHASE",
    "merchantId" : "PPIMM",   = API USER NAME
    "merchantReferenceCode" : "e7b716aada75ba45f7020db578e425e5",
    "amount" : 55.00,
    "currency" : "GBP",
    "billTo" : {
        "email"     : "payer@gmail.com",
        "id"        : "QLT5PWFAQ9ABC"
    },
    "externalTransactionId" : "1X9065ABCDE36184C",
    "reconciliationID" : "4189957733",
    "recurringPayID" : "B-6396326104708",
    "requestTimestamp" : "2017-02-12T16:53:57Z",
    "paymentParts" : [
    {
        "client" : "370",
        "amount" : 45.00
    },
    {
        "client" : "6701",
        "amount" : 10.00
    }
    ]
}