Tracking Engagement on LinkedIn Charity Spotlights for Sales Connections

We offer a technology platform that allows salespeople to connect with execs in their target market in return for a charitable donation. When we run LInkedIn spotlights of those executives that are willing to meet in return for a donation to their charity of choice, those posts tend to get lots of likes and comments. Is there any tool that we can use to track and capture the details of those people that are liking and commenting on those posts? We'd like to contact those that like the post and as them if they'd also like to participate on this not-for-profit platform.