display json properties in content-metadata-presets

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ssaadaoui

I customize a content-metadata-presets and it works perfectly . my problem is: I like to display a json propety of a document like a many properties.

actually I have : 

signers:

 [{"isInternal":false,"firstName":"Mark","lastName":"jacksson","coordinate":"0,0,595,65","telephone":"","id":"","page":1,"email":"***","username":"","order":2}]

 but my goal is to show like: 

signers:

isInternal:false      

firstName:Mark

lastName:jacksson

coordinate:0,0,595,65

Do you have any solution  to resolve this problem. 

Thank you  

ssaadaoui

to more explain my problem, there is what i have now in metadata

but i like show like :

>isInternal: true

>firstname:...