Hi Yafim,
I’m not sure I completely understand, but you can either save the entire object as a single field and use code to parse it yourself. However if you then wish to update a single value you will have to construct the full object and update all the object text.
Or, you could use wixData.save and insert/update multiple values at once.
You could then use a dataset on your page to easily connect to your collection, filter values, and connect the values to a table - without a single line of code.
check out these articles:
Let me know if that helped you with your goal.