iterate JSON - JSON.parse
JSON.parse example
by dshilkret
HTML
<ul id="groups"></ul>
JavaScript
var jsonString = '[{"query":{"bool":{"must":[{"term":{"Field":"task.work_start"}},{"term":{"Field":"task.work_start"}},{"term":{"Field":"task.assigned_to"}}]}}}]';
var myData = JSON.parse(jsonString);
$(document).ready(function() {
var $grouplist = $('#groups');
$.each(myData, function() {
$('<li>' + this.query.bool.must[0].term.Field + '</li>').appendTo($grouplist);
});
});