Get course contents using webservice

I am using Moodle 3.1+. I am trying to get the course contents using webservice. I have created a course with activity 'lesson'. Now when I try to get the contents of the course using webservice 'core_course_get_contents', I am getting the following response. [{"id":36,"name":" 0","visible":1,"summary":"","summaryformat":1,"modules":[{"id":18,"url":"http:\/\/localhost\/moodle\/mod\/lesson\/view.php?id=18","name":"Lesson1","instance":1,"visible":1,"modicon":"http:\/\/localhost\/moodle\/theme\/image.php\/mentornetz\/lesson\/1483338014\/icon","modname":"lesson","modplural":"Lessons","indent":0}]}] But the response doesn't contain the lesson details. Moodle API documentation says that response contains below details which is missing in my response. contents list of ( object { type string //a file or a folder or external link filename string //filename filepath string //filepath filesize int //filesize fileurl string Optional //downloadable file url content string Optional //Raw content, will be used when type is content timecreated int //Time created timemodified int //Time modified sortorder int //Content sort order userid int //User who added this content to moodle author string //Content owner license string //Content license } Below is the response for the webservice core_course_get_course_module object { cm object { id int //The course module id course int //The course id module int //The module type id name string //The activity name modname string //The module component name (forum, assign, etc..) instance int //The activity instance id section int //The module section id sectionnum int //The module section number groupmode int //Group mode groupingid int //Grouping id completion int //If completion is enabled idnumber string Optional //Module id number added int Optional //Time added score int Optional //Score indent int Optional //Indentation visible int Optional //If visible visibleold int Optional //Visible old completiongradeitemnumber int Optional //Completion grade item completionview int Optional //Completion view setting completionexpected int Optional //Completion time expected showdescription int Optional //If the description is showed availability string Optional //Availability settings } warnings Optional //list of warnings list of ( //warning object { item string Optional //item itemid int Optional //item id warningcode string //the warning code can be used by the client a...