Post

jQuery.ajax({
            "method": "post",
            "url": "/api/SCHA_ASC_PS_IndividualDemo",
            "headers": { "RequestVerificationToken": jQuery("#__RequestVerificationToken").val()},
            "dataType": "json",
            "contentType": "application/json",
            "data": JSON.stringify({
                "$type": "Asi.Soa.Core.DataContracts.GenericEntityData, Asi.Contracts",
                "Properties": {
                    "$type": "Asi.Soa.Core.DataContracts.GenericPropertyDataCollection, Asi.Contracts",
                    "$values": [
                    {
                            "$type": "Asi.Soa.Core.DataContracts.GenericPropertyData, Asi.Contracts",
                            "Name": "ID",
                            "Value": user
                        },
                        {
                            "$type": "Asi.Soa.Core.DataContracts.GenericPropertyData, Asi.Contracts",
                            "Name": "IndRegion",
                            "Value": region
                        }
                    ]

                }
         }),

    success: function(data) {
     console.log(data);
    },
    error: function() {
      console.error("runRequests Error", "user", arguments);
    },
    complete: function() {
      runRequests(++userIndex);
    }
  });