Funding slug change

Hey all, I would like to change the "message" for one of the funding slugs if possible. I have included the json below with the altered "message". Thanks so much!

{ "fields": { "slug": "summerville", "message": "Funding for the digitization of this title was provided by the Chattooga County Historical Society with a grant from the Tillotson-Menlo Charitable Foundation, Inc. Additional funding was provided by Georgia Public Library Service, a unit of the Board of Regents of the University System of Georgia, using federal Library Services and Technology Act funds administered through the Institute for Museum and Library Services.", "image": "images/gplsimls.png" }, "model": "core.fundingsource", "pk": 28 }