{
  "manageEntity": {
    "action": "Update",
    "entityId": "819927783",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieradbr5fyboiggv34rbdmye4v6mkk2i2hulctj5wdahgdetg2zzj7aa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1683772870},{\"type\":\"playlist\",\"playlist_id\":1323909480}]}}}",
    "nonce": "0xa94145dcffedec18a14875dc70d9799fd8d9f6e298624aa458e832f9b04cfc79",
    "signature": "0x7a5876f251dc433e8403de5d3ae40722f963b3d1dd9995dc14dda7a22166baa847e85827dcff77c0e8fcbec58395a6b8267a9e205fabafbc08ae459d45c815551c",
    "signer": "0x45dAf7d8C91b01b2F5E651081b5910a6b272928D",
    "userId": "819927783"
  }
}