{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/DownstreamId",
  "title": "DownstreamId",
  "type": "string",
  "description": "The third-party API ID of original entity",
  "example": "12345",
  "nullable": true,
  "readOnly": true
}