This connection is within MCT. The question is whether it is within Sensible Connection Time (SCT). If OP misconnects, it will fall to AA to rebook. But, there are only three BNA-MIA daily frequencies and thus a misconnect may mean a long wait or a very inconvenient reroute. Thus, if this is part of a complex itinerary, particularly involving separate ticets on other carriers or OP's commitments at MIA are fixed, this connection may have serious consequences.
Only OP can evaluate what it means if he is delayed into MIA by 1/2 day or more.