Below is my code:
$.ajax({
    type: "GET",
    url: "content/content.json",
    success: function( data ) {
        check = true;
        ajaxMap = data;
        drawMap(data);
    }
});
function drawMap( data ) {
   $('#map').mapSvg({
      source: 'maps/test.svg',
      colors: {
         selected: "#00431e",
         disabled: "#ffffff"
      },
      tooltipsMode: 'custom', 
      zoom: true,
      zoomButtons: {'show': true, 'location': 'left'},
      pan: true,
      responsive: true,
      zoomLimit: [0,500],
      marks: data,  // here I pass data from JSON file
      tooltipsMode: 'custom',
      zoom: true,
      pan: true,
      responsive: 0,
      zoomLimit: [0,100]
  });
}
It works when I pass data as JSON format directly in marks, but when I pass data variable it doesn't work.
Updated: This my json data:
[
  { c: [50.84199288,122.83167],
      attrs: {'src': 'markers/pin-yellow.png'},
      tooltip: '<h2>Dublin - Ireland</h2><p>Embassies and High Commissions</p><a href="http://www.dfat.gov.au/geo/ireland/" title="http://www.dfat.gov.au/geo/ireland/">Read More</a>'
  },
  { c: [44.94199288,119.93167],
      attrs: {'src': 'markers/pin-yellow.png'},
      tooltip: '<h2>London - United Kingdom</h2><p>Embassies and High Commissions</p><a href="http://www.dfat.gov.au/geo/united_kingdom/" title="http://www.dfat.gov.au/geo/united_kingdom/">Read More</a>'
  },
  { c: [28.94199288,100.93167],
      attrs: {'src': 'markers/pin-yellow.png'},
      tooltip: '<h2>Header</h2><p>Embassies and High Commissions</p><a href="#" title="">Read More</a>'
  },
  { c: [44.94199288,115.93167],
      attrs: {'src': 'markers/pin-yellow.png'},
      tooltip: '<h2>Header</h2><p>Embassies and High Commissions</p><a href="#" title="">Read More</a>'
  },
  { c: [20.94199288,135.93167],
      attrs: {'src': 'markers/pin-yellow.png'},
      tooltip: '<h2>Header</h2><p>Embassies and High Commissions</p><a href="#" title="">Read More</a>'
  }
]
 
     
     
    