{
  "manageEntity": {
    "action": "Update",
    "entityId": "511866195",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7f5cb4e07628dbc32c589f8da019129535e0cb66f29b7c8201f48a6667b18c5a",
    "signature": "0x82e94a99e37e70913317b5e88e8577d7edc1d973ef2bb4cad5d4a3e43c582c6d082c41549824e788c15cda9d9c22f666071c932b5017aa628065caf835e41be81c",
    "signer": "0x552462F88317e9e6E53695Dc39DF4901dB608f78",
    "userId": "511866195"
  }
}