Note: the 2 pieces of code you need to customize are in bold below:
- Exact name of your Model
- Exact name of your custom Signature field
var element = arguments[0],
$ = skuid.$;
$(".nx-page").one("pageload", function() {
// init signature canvas
element.jSignature();
element.jSignature("reset");
// Create new signature in text field
var model = skuid.model.getModel('Contact'),
row = model.getFirstRow(),
sigField = 'Signature__c',
sigData = model.getFieldValue(row,sigField);
if(sigData !== null ) { // read back Signature data
element.jSignature("setData", "data:" + sigData);
}
})