Although, perhaps, if Miami technically paid the buyout on behalf of Manny the payment may be considered compensation to Manny.
The thing to remember is "base salary" for head football coaches at the P5 level is generally low in comparison to total compensation. The base salary rarely exceeds $500k to $600k. This is used to determine standard employee benefits he would receive like retirement plan contributions, vacation allowances, and life/disability insurance coverage. Current federal law limits this amount to be considered for benefits to something like $270k but one of the accountants on here can confirm the exact amount. The bulk of what he gets paid goes in the supplemental bucket and consists of compensation to satisfy the media/apparel contracts and for use of his NLI as well as to retain the rights to any camps to advertise as a camp in the university's name (versus in the coach's name which he would retain all proceeds of). Supplemental compensation would include the bonuses paid for wins, graduation rates, recruiting rankings, bowl game appearances, etc.