code: public Map<String, Object> parseTreeTSUIDsListV1() {
      final String json = query.getContent();
      if (json == null || json.isEmpty()) {
        throw new BadRequestException(HttpResponseStatus.BAD_REQUEST,
            "Missing message content",
            "Supply valid JSON formatted data in the body of your request");
      }
      
      return JSON.parseToObject(json, TR_HASH_MAP_OBJ);
    }
docs: Parses a tree ID and optional list of TSUIDs to search for collisions or
  not matched TSUIDs.
  @return A map with "treeId" as an integer and optionally "tsuids" as a
  List<String>
  @throws JSONException if parsing failed
  @throws BadRequestException if the content was missing or parsing failed