{
  "manageEntity": {
    "action": "Update",
    "entityId": "449208082",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraplwak245eyettnse7r4ydxbkevooynpbvatkz5nyiml3gbumedga\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":443931609},{\"type\":\"playlist\",\"playlist_id\":1670530186}]}}}",
    "nonce": "0x30c5064efbcb71443d6325de85d2d6ee6c532b84d2e3357853d236dd8b19c7c2",
    "signature": "0x72c54b525d45dbc29316f7aae7f8ebfd27922f6a4d0955c2df0339a94fb0052354ecea5507ea54c92a2a61e267383dbf46fe8bafae428dc62a4bb7e2301424db1b",
    "signer": "0x1c2B7030474cD7eD157833aCbA6053665090ABF4",
    "userId": "449208082"
  }
}