Describes subscription subject
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/SubscriptionSubjectContract", "title": "SubscriptionSubjectContract", "required": [ "type" ], "type": "object", "properties": { "type": { "$ref": "#/components/schemas/SubscriptionSubjectType" }, "id": { "type": "string", "description": "Subject ID of a subscription. Complements SubjectType.\r\n\r\nE.g. SubjectType = \"FlightNumber\" and SubjectId = \"DL 47\" means that this\r\nsubscription is for all updates of flight with number DL47.", "nullable": true } }, "additionalProperties": false, "description": "Describes subscription subject" }