{
  "manageEntity": {
    "action": "Update",
    "entityId": "513100334",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraqprhaawkgqo6bafshx32ta5u4heerrz6cjjed45j7nbpunhx47pq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1155126198},{\"type\":\"playlist\",\"playlist_id\":1745519063},{\"type\":\"playlist\",\"playlist_id\":1828603427}]}}}",
    "nonce": "0x7f771486ed3b507ea02a2181dbde24089e011694931b628bcef80fdc7c8a256e",
    "signature": "0x70c8acc677cbfcbb34f150f168d4a2521931374017d8672828618f017eaa817a19c9e8ab23b3ca105ba034465f168ff2e80823d661caca0ce79fdb99dc5af2511b",
    "signer": "0xEFec33FF65644dee8EaE96E99C93429330B67c16",
    "userId": "513100334"
  }
}