Error in IndexManagement

Hello @Taku
Just copy/paste your example and replaced quote mark to the "

PUT _index_template/winlogbeat
{
  "index_patterns": ["winlogbeat-*"],
  "settings": {
    "opendistro.index_state_management.policy_id": "delete"
  }
}

I got the error about incorrect method.

For my recent test I used another endpoint - PUT _template/