How to add data to tv migx(MODX)?

Question

MODX

Created TV-MIGX

[{"caption":"Event List","fields": [
{"field":"Time_Data",
"caption":"Time"
},{
"field":"Text",
"caption":"Message"
}
]
}]

Now you need to add data to the array in the snippet or chunk.
I did not find any data at all on adding new data other than manual.
Tell me please.