{
  "manageEntity": {
    "action": "Update",
    "entityId": "550138957",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera5pppqjan3e4chbexv27weupkociipfys5yvbs35u7q76si7yajyq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":2114341531},{\"type\":\"playlist\",\"playlist_id\":1872571100}]}}}",
    "nonce": "0xd0c5b9494028265a403167c37ac472b5adededfbeaa39f1809beddebdf48dabe",
    "signature": "0x20a1fdbcb10dab15e141123acaab5b61a295724d3f3771405c3a5a32c07802595378b7b3eefff045d920a3d463a3b813289289e5e098dad794f4096104c3582b1b",
    "signer": "0x89de1a45782C6F6cf99058C1C0104bCC44c2f489",
    "userId": "550138957"
  }
}