How do I push an array inside an object array

JavaScript
5

so I have this object

const data = [
{"draw_date":"2022-03-16T00:00:00.000","winning_numbers":"34 42 48 51 56 59","bonus":"6"}
]

and I want to create a data structure that I can group the winning numbers

"winning_numbers":"34 42 48 51 56 59"

with the day

"draw_date":"2022-03-16T00:00:00.000"

So I would have an object with keys that will group the winning numbers like 0 will group numbers from 0-9, 1 => 10-19, 2 => 20-29, … , 5 => 50-59

{0,1,2,3,4,5}

and each key will have an array of the winning_numbers with its date, there is only 1 row object in the example but I want to use like 1,000 rows

const newObject  = {
...
3: [ day: {
    '2022-22-03': [32,32],
    ...
    '2022-25-12': [30,33, 39]
  }]
...
}