JSON property have dynamic name

Question

I'm tryng to access at value of property id,
but the name (156_teamtoteam_male_863458) is dynamic.
How I can do that?

data: {
  '156_teamtoteam_male_863458': {
    t: {
      id: '863458',
      nm: 'ATP Cup, Group C',

The name is not ever "156_teamtoteam_male_863458" but can change and I dont know how it is called the next time. I would something like console.log(JSON.data.*.t.id);