{
  "manageEntity": {
    "action": "Update",
    "entityId": "507170227",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierauirmosl7lmczopys3ae7ctrvbvsackqmkklzzutu6qupcmu2zv7q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":678560258},{\"type\":\"playlist\",\"playlist_id\":1787102543},{\"type\":\"playlist\",\"playlist_id\":1609963808},{\"type\":\"playlist\",\"playlist_id\":1876785063}]}}}",
    "nonce": "0x75d60113d85288ab374fa639a9ab487fd23f32499a2913b4a4f54a61e3039073",
    "signature": "0x2aa50578c2403000bba275a33019c1695f45a6914f58c08751142bacbb14f56f79f01972fecacfec0717a4ab85098e72adebd5b3fb557c3eddf98ec1a9b630a01b",
    "signer": "0x56F7450749B92d306C521a22A64BFfc99f3C4756",
    "userId": "507170227"
  }
}