索引生命周期explain能否显示时间格式

在对索引进行 _ilm/explain时,能否将long类型的时间显示为字符串格式,比如下面的lifecycle_date_millis字段,能否显示为2019-04-10 08:00:00
"logstash-spring-es-dev-2019.04.10" : {
"index" : "logstash-spring-es-dev-2019.04.10",
"managed" : true,
"policy" : "log_policy",
"lifecycle_date_millis" : 1554854401045,
"phase" : "new",
"phase_time_millis" : 1554854401292,
"action" : "complete",
"action_time_millis" : 1554854401292,
"step" : "complete",
"step_time_millis" : 1554854401292
}