Change value of one or more nested elements.

[chotaGit]

Hello,

I have a DB Structure like this:

{
"_default": {
"3": {
"Stripe": {
"invoiceID": "inv1",
"invoiceVersion": 0,
"Status": "CREATED",
"FName": "John",
"LName": "Doe",
"Email": "[email protected]",
"PhoneNo": "+19999999999"
},
"cancelEvent": 0,
"eventVersion": 0
}
}
}

How can I update just one field like FName or invoiceID or multiple fields within one block? Since this is a second level element, I am not sure how to write the query? Do I need to use the set function? If so, how do I specify the key?

Thanks in anticipation.