The hydrolysis of the ester shown here is catalyzed by morpholine, a secondary amine. Propose a mechanism

Question:

The hydrolysis of the ester shown here is catalyzed by morpholine, a secondary amine. Propose a mechanism for this reaction. (The pKa of the conjugate acid of morpholine is 9.3, so morpholine is too weak a base to function as a general-base catalyst in this reaction.)