I can get all process variables as JSON

[saig0]

Is your feature request related to a problem? Please describe.
A process instance has many variables. I can see these variables in the process instance view in a key-value table. If I want to create a new instance of the process with the same variable then I need to collect all variables from the table.

Describe the solution you'd like
I can get all variables of the process instance as a JSON document. Either only the global variables or the variables from a given element's view.

Describe alternatives you've considered
I collect the variables manually from the variable table.

Additional context