{
  "manageEntity": {
    "action": "Update",
    "entityId": "511721106",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahigkz7w5e5fw7uxq7q2y66grdxh3geklhpcslwv7ax5sdekza7pq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":539860050}]}}}",
    "nonce": "0xf39beafd46096b8ba069f365db204d28e8c7b6183d16e63c402f96f82aed3abc",
    "signature": "0x6ab9ed7c17033187ee309c7816958b964c75d028a67d304c72c4e4f3e827c3590c3a67ec0ffedc17ab9f1de203ee9874115ee7376381575506f5edc885f020b81b",
    "signer": "0x47dbED9A6aEEcAa660D5be033a565bd140969326",
    "userId": "511721106"
  }
}