datatables number of results from JSON - ajax

Question

I have a pretty simple question on datatables for which I couldn't find an answer.
I'm using Spring MVC to generate a JSON, which has the following format:
{
"content": [
{
"id": 1,
"firstName": "\u00d6sten",
"lastName": "Dixon",
"email": "hdixon0#forbes.com",
"country": "Belarus",
"ipAddress": "196.228.168.184",
"creditCard": "060479202511002980",
"company": "Trunyx",
"timezone": "Atlantic\/South_Georgia",
"iban": "LV55 ECXH IGFF GSEW YHMU G",
"latitude": "52.644",
"longitude": "25.2027",
"race": "Blackfeet"
},
{
"id": 2,
"firstName": "Agn\u00e8s",
"lastName": "Perry",
"email": "wperry1#blogspot.com",
"country": null,
"ipAddress": "75.63.229.226",
"creditCard": "5191970963453131",
"company": "Tanoodle",
"timezone": "Asia\/Kabul",
"iban": "TN75 8279 0633 7374 0209 2905",
"latitude": "11.97444",
"longitude": "-86.09417",
"race": null
},
// more
],
"totalPages": 51,
"last": false,
"totalElements": 503,
"size": 10,
"number": 0,
"sort": null,
"numberOfElements": 10,
"first": true
}
I'd like to display the result using datatables, however it looks like it's expecting a "iTotalRecords" for example, where my JSON has a "totalElements"
How can I specify that mapping?
$(document).ready(function () {
$('#datatable').DataTable({
"bProcessing": true,
"bServerSide": true,
"sAjaxSource": "members",
"sAjaxDataProp" : 'content',
"columns": [
{ "data": "id" },
{ "data": "firstName" },
{ "data": "lastName" },
{ "data": "email" },
{ "data": "country" },
{ "data": "ipAddress" },
{ "data": "creditCard" },
{ "data": "company" },
{ "data": "timezone" },
{ "data": "iban" },
{ "data": "latitude" },
{ "data": "longitude" },
{ "data": "race" },
]
});