Add new row in a table from dialog

Hello,

i have a MockData.json, my model where i have the data and i show them on a table, i have a new fragment with fields who popup when the click on "add button" so i need to add the new data to table and to the model.

my model:

my table:

my dialog:

i need a function AddNewContributor who handles the add and how to add the new contributor in MochData.json

Thank you in advance.