How to implement approval workflow/process in Bamboo prior to release?

Dear Experts,

My requirement is the deployments and releases require manager approval prior to being executed. To my knowledge currently the Bamboo doesn’t offer a native Approval workflow for Deployments. So, I want to understand if there any alternate solution like Service Now to implement this approval process prior to release.
Above will take care that releases in Bamboo are only done for Changes which has been duly approved in ServiceNow or Kindly advise if there is any other solution.

Looking for your great advise.