Add a JSON feature class to a map using ArcGIS javascript API

I am a beginner in javascript and I am working on a project using the ArcGIS javascript API. Since I am using shapefiles, I need a way to put them on the map automatically after a procedure. I have been suggested to convert the shapefile to a JSON string, which I did using ESRI.ArcGIS.ConversionTools.FeaturesToJSON. It gives me something like this:

{
    "displayFieldName": "",
    "fieldAliases": {
        "FID": "FID",
        "IDENTIFIER": "IDENTIFIER",
        "DISPLAY": "DISPLAY",
        "COLOUR": "COLOUR"
    },
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
        "wkid": 32186,
        "latestWkid": 32186
    },
    "fields": [{
        "name": "FID",
        "type": "esriFieldTypeOID",
        "alias": "FID"
    }, {
        "name": "IDENTIFIER",
        "type": "esriFieldTypeString",
        "alias": "IDENTIFIER",
        "length": 254
    }, {
        "name": "DISPLAY",
        "type": "esriFieldTypeString",
        "alias": "DISPLAY",
        "length": 254
    }, {
        "name": "COLOUR",
        "type": "esriFieldTypeDouble",
        "alias": "COLOUR"
    }],
    "features": [{
        "attributes": {
            "FID": 0,
            "IDENTIFIER": " ",
            "DISPLAY": "True",
            "COLOUR": 0
        },
        "geometry": {
            "paths": [
                [
                    [230203.36252065492, 5370086.4987341948],
                    [230195.42152014989, 5370082.7258209372],
                    [230229.82547157537, 5370076.1204356803],
                    [230230.58002531325, 5370076.9307560939],
                    [230231.34286282485, 5370077.8994241506],
                    [230231.94069129985, 5370079.0473612295],
                    [230232.4038794667, 5370080.3275831603],
                    [230232.78926402796, 5370081.3478309968],
                    [230233.07412446581, 5370082.266860785],
                    [230233.20385479546, 5370082.7032454694],
                    [230233.49509875989, 5370083.1654702397],
                    [230233.81149685301, 5370083.6553206556],
                    [230233.89962032362, 5370083.7566910088],
                    [230234.22350693849, 5370083.8735930277],
                    [230235.23812436999, 5370084.6618494503],
                    [230235.7265868854, 5370085.0375824366],
                    [230236.93800452136, 5370086.1774356738],
                    [230238.91537520697, 5370087.1114649111],
                    [230241.20344435755, 5370088.5726968031],
                    [230242.10950562957, 5370089.1200344963],
                    [230243.1274934996, 5370089.6938548377],
                    [230245.73496147123, 5370091.402549807],
                    [230247.58051963543, 5370092.6832000325],
                    [230247.85058683314, 5370092.9499494741],
                    [230247.97786052118, 5370093.1999530876],
                    [230248.02382869384, 5370093.3950914163],
                    [230247.90815344563, 5370093.5550719444],
                    [230247.83746374052, 5370094.7770727118],
                    [230251.59447348068, 5370093.8700312478],
                    [230256.07295378071, 5370094.5567273004],
                    [230271.93292641686, 5370107.4999685455],
                    [230284.57099391034, 5370120.0941871861],
                    [230283.04288481449, 5370122.6776164165],
                    [230273.76307012059, 5370120.3203884307],
                    [230267.85401282064, 5370118.7949806377],
                    [230267.04651756078, 5370118.1997346235],
                    [230266.42955295654, 5370117.4808098888],
                    [230260.8462208565, 5370117.1535397889],
                    [230253.55863216554, 5370125.3309558751],
                    [230252.9894960777, 5370132.4784455141],
                    [230254.132238747, 5370135.4647953082],
                    [230251.42881939228, 5370134.9411432538],
                    [230249.04957992013, 5370132.2041026689],
                    [230251.995854404, 5370124.8109164219],
                    [230261.60623797448, 5370126.380779258],
                    [230271.53357044971, 5370133.660332839],
                    [230271.13617243501, 5370130.7853333829],
                    [230268.41419420805, 5370096.8456510343]
                ]
            ]
        }
    }]
}

Now I am trying to put this on the map but it does not work. I tried a few ways but seriously, I don’t understand much what I am doing. It crashes on the new featureLayer with a “cannot get property length of undefined”.

I don’t care that much about converting it in JSON or not, I need to have a function which can put a shapefile on a ArcGIS javascript map.

Here is the code:

// shapeJSON is the JSON string

var featureCollection = {
    "layerDefinition": null,
    "featureSet": {
        "features": [],
        "geometryType": "esriGeometryPolyline"
    }
};

featureCollection.layerDefinition = shapeJSON
addShapefileJSON(featureCollection);


var featureLayer = new esri.layers.FeatureLayer(featureCollection, {
       mode: esri.layers.FeatureLayer.MODE_ONDEMAND
});

map.addLayer(featureLayer);