handle event on stock quantity change in Product Attribute Combination

I want to do something when the stock quantity of an attribute combination change,
I write this code but it does not work and nothing happened:

public class SpecialOfferAvailabilityPlugin : BasePlugin, IConsumer<EntityInsertedEvent<StockQuantityHistory>>

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public void HandleEvent(EntityInsertedEvent<StockQuantityHistory> eventMessage) 

would you please tell me on which domain should I create handle?

RE: "nothing happened"
You've set a breakpoint in HandleEvent method, and it never gets hit?

New York wrote:

exactly,
I've test

EntityUpdatedEvent<ProductAttributeCombination>

and it hits when I change something of attribute from the admin panel, but,

EntityInsertedEvent<StockQuantityHistory>

not hit when I change the quantity of attribute from admin panel.

It was my mistake, I didn't install my plugin🤦‍♂️