Dealing with randomly generated and inconsistent JSON field/key names using GSON

I have the following JSON snippets:

{ "randomlygeneratedKeyname0" : "some-value",
  "randomlygeneratedKeyname1": {
       "randomlygeneratedKeyname2" : {
           "randomlygeneratedKeyname3": "some-value",
           "randomlygeneratedKeyname4": "some-value"
       },
       "randomlygeneratedKeyname5": {
           "randomlygeneratedKeyname6": "some-value",
           "randomlygeneratedKeyname7": "some-value"
       }
   }
}

Notes that I don't know the name of randomlygeneratedKeyname and their naming convention is inconsistent so I could not create my corresponding Java field/variable names.

How do I (de)serialize it in GSON?

Thanks in advance for your help.