java – Parson json with different variable name

How can I analyze Json like this?
Each variable has a different name.
I tried using HashMap, but maybe someone knows other methods?

  { 
    "5cde6b35d0e85e6120ad411a": [
      {
        "user": "5dbbdfdbdaaad54e26371091"
      },
      {
        "user": "5dbaadc3407aac5be784371b"
      }
    ]
  },
  {
    "5cdeasdad233132dasdxzcsa": [
      {
        "user": "5dbbdfdbdaaad54e26371091"
      },
      {
        "user": "5dbaadc3407aac5be784371b"
      }
    ]
  }
]```