Como puedo insertar datos a un Chart.js con ajax?

var ctx = document.getElementById("myChart").getContext('2d');   var myChart = new Chart(ctx, {     type: 'bar',     data: {       labels: ["Cocina", "Limpieza", "Atención", "Parqueo", "Local"],       datasets: [{         label: '',         data: [100, 92, 80, 96, 75],         backgroundColor: [         'rgba(255, 99, 132, 5)',         'rgba(54, 162, 235, 5)',         'rgba(255, 206, 86, 5)',         'rgba(75, 192, 192, 5)',         'rgba(153, 102, 255, 5)',         'rgba(255, 159, 64, 5)'         ],         borderColor: [         'rgba(255,99,132,1)',         'rgba(54, 162, 235, 1)',         'rgba(255, 206, 86, 1)',         'rgba(75, 192, 192, 1)',         'rgba(153, 102, 255, 1)',         'rgba(255, 159, 64, 1)'         ],         borderWidth: 1       }]     },     options: {        scales: {         yAxes: [{           ticks: {             beginAtZero:true           }         }]       }     }   });
{ "EvaluationDetails" : [ { "aspectId" : 0 , "aspectResult" : 0 } ] , "evaluationTemplateId" : 0 , "entityId" : 0 , "número" : 0 }