DSS REST API StatusCode 400 response

Hi, I am trying to call the DSS REST API with the following Javascript code

exports.getEOD = function(token, success, failure) {
    var https = require('https');
    var url = 'hosted.datascopeapi.reuters.com';
    var path = "/RestApi/v1/Extractions/ExtractWithNotes";
    var response = ''


    var options = {
        hostname: url,
        path: path,
        method: 'POST',
        headers: {
            'Authorization': 'Token ' + token,
            'X-Client-Version': 'restapiv1.10.2.884.0',
            'Prefer': 'respond-async, wait=5'
        }
    };


    var postData = JSON.stringify({
        "ExtractionRequest": {
            "@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ExtractionRequests.EndOfDayPricingExtractionRequest",
            "ContentFieldNames": [
                "Asset Status",
                "Asset Type",
                "Bid Price",
                "Currency Code",
                "CUSIP",
                "File Code",
                "Ask Price",
                "High Price",
                "Low Price",
                "Mid Price",
                "Volume",
                "Net Asset Value",
                "Offer Price",
                "Official Close Price",
                "Open Price",
                "Previous Close Price",
                "RIC",
                "Security Description",
                "SEDOL",
                "Ticker",
                "Trade Date"
            ],
            "IdentifierList": {
                "@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ExtractionRequests.InstrumentIdentifierList",
                "InstrumentIdentifiers": [
                    {
                        "Identifier": "191216100",
                        "IdentifierType": "Cusip"
                    },
                    {
                        "Identifier": "2005973",
                        "IdentifierType": "Sedol"
                    },
                    {
                        "Identifier": "AAPL.OQ",
                        "IdentifierType": "Ric"
                    }
                ]
            },
            "Condition": null
        }
    })


    var req = https.get(options, function(res) {
        if (res.statusCode == 200) {
            res.setEncoding('utf8');
            res.on('data', function(chunk) {
                response = response + chunk
            });
            res.on('end', function() {
                success(response)
            })
        }
        else{
            console.log('statusCode: ' + res.statusCode);
            failure(JSON.stringify(res.headers))
        }
    });


    req.on('error', function(e) {
        failure(e.message)
    });
    console.log(postData)
    req.write(postData);
    req.end();
}

I get the following response

statusCode: 400

EOD Error: {"cache-control":"no-cache","pragma":"no-cache","content-type":"application/json; odata.metadata=minimal; odata.streaming=true","expires":"-1","server":"Microsoft-IIS/7.5","odata-version":"4.0","x-request-execution-correlation-id":"e26efcaf-e571-4816-92b1-07e232a7b6cd","x-app-id":"Custom.RestApi","x-app-version":"10.4.77.0","x-powered-by":"ASP.NET","date":"Fri, 04 Mar 2016 14:56:37 GMT","content-length":"2356"}

What could the problem be?