curl --request GET \
  --url https://api.portkey.ai/v1/policies/usage-limits/{policyUsageLimitsId}/entities \
  --header 'x-portkey-api-key: <api-key>'

{
  "object": "list",
  "data": [
    {
      "id": "<string>",
      "value_key": "<string>",
      "current_usage": 123
    }
  ],
  "total": 123
}