Update Context Variable Object.Object Property

[KurtSchron]

I have a Context Variable that is an Object with many properties. 

I have some text inputs that perform a Patch function OnChange of the input. 

What I would like to do is then update the Context Variable Object so if the user navigates to other pages that still use that context variable it is accurate. 

I've tried, 
UpdateContext( { GallerySelectedProject: Patch( GallerySelectedProject, {percent_to_close: Value(pctToCloseInput.Text) } ) } );
UpdateContext({GallerySelectedProject: {percent_to_close: Value(pctToCloseInput.Text) } });

Neither seem to work and start to throw a lot of errors as it appears that it is overwriting the whole context variable but I just want to update this one property. I looked at this page and either of these seem like they should work but they are not. https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-updatecontext

Any help? 

[Jeff_Thorpe]

What does the object in the content variable look like?

[KurtSchron]

I set it when a user clicks on a gallery using the navigate, 

Navigate(ProjectDetails,ScreenTransition.Cover,{GallerySelectedProject: ThisItem, editFormStatus: false, varShowEstimateDetails: false})

It has many properties on that next page like, 

GallerySelectedProject.engineer = "Joe Smith"

GallerySelectedProject.opportunity = 10000

...

So an object like GallerySelectedProject{engineer: "Joe Smith", opportunity: 10000, .... }