{
  "manageEntity": {
    "action": "Update",
    "entityId": "351579823",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3ae545733713507787a960790a5a408c464b5265022b79e35bc576923e5cbbec",
    "signature": "0x9027e07ed053e5f7626a80dbb30dfbbc9a56920bc3051463d6aeaf9971bf54d37509679b2ce9a8291823394269ed7b26b80072d326c33404be8b70738bd6f10b1b",
    "signer": "0x55408F18dc0E716333F0688A0Dc07439D875f842",
    "userId": "351579823"
  }
}