Assert any array node equals

Situation: I have an API under test where one of the endpoints allows me to POST some object with a bunch of values. To test the backend fully I need to check that the object can be retrieved, but the only GET endpoint I can use returns an array of ALL of these object created. The object I just created could be anywhere in this array.

Problem: I cannot figure out how to get ReadyAPI to assert that any object in the array matches what I input. Using say, Smart Assertion, I can assert that the object at index 13 equals the my input, but the object I created in the POST might be at index 20, or 4000, or 0.

I like the functionality of Smart Assertion but I can't figure out how to get it to assert that the correct object exists anywhere in the array returned from the GET. Is this possible?