GET /v1/notification-groups/{notificationGroupUid}/subscription

Subscription filter: when multiple dimensions are set, an alert matches if it satisfies at least one (OR).

• strategyGroupUids: alert's strategy must belong to one of these groups.
• strategyUids: alert's strategy_uid must be in this list.
• strategyLevels: alert's (strategy_uid, level_uid) must be in this list.
• labels: alert must contain all these key-value pairs with the same values.
• excludeLabels: alert must not contain any of these key-value pairs (subset match).
• datasourceUids: alert's datasource must be in this list.
• datasourceLevelUids: alert datasource's level_uid must be in this list.