Lost Letter of Heroes Event

{
  "given_items_count": 0,
  "gold_wanted": 0,
  "items_wanted_count": 0,
  "monster_wanted_count": 0,
  "no_text": null,
  "ok_text": null,
  "premise_faction": 0,
  "premise_period": 0,
  "premise_repu": 0,
  "sub_quest_count": 4,
  "tribute": null
}