Не находит объект

$.get("https://api.worldoftanks.ru/wot/account/tanks/?application_id=не важно8&account_id=" + account_id + "&language=ru", function(data) {
    meta = data.meta.count;
    battles_tank = data.data[account_id].statistics.battles;
    
    /*
    for (var i = 0; i < meta; i++) {
      console.log(battles_tank[i]);
    }
    */
  });

Вот данные из JSON

{"status":"ok","meta":{"count":1},"data":{"1351837":[{"statistics":{"wins":12,"battles":27},"mark_of_mastery":2,"tank_id":6401}

Вот ответ:

Cannot read property 'battles' of undefined