var fromArray = [];

var PhoneCall = {
    from: fromArray,
    to: toArray,
    Subject: "Create a phonecall record",
    OwnerId: fromArray,
    PhoneNumber: phoneNumber
}


    CrmRestKit.Create("PhoneCall", PhoneCall)
            .fail(function (xhr, status, errorThrown)
            {
                console.log(JSON.stringify(xhr, null, 4));
                console.log(JSON.stringify(status, null, 4));
                console.log(JSON.stringify(errorThrown, null, 4));

            })
            .done(function (data, status, xhr) {
                console.log(JSON.stringify(data, null, 4));
}