{
  "manageEntity": {
    "action": "Update",
    "entityId": "577745560",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierallyjlpxbbiqspjlfvhdrzevjhryl537jpoxngufwhokucoa4iueq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":649011190},{\"type\":\"playlist\",\"playlist_id\":748115907},{\"type\":\"playlist\",\"playlist_id\":558862778}]}}}",
    "nonce": "0xd9ce9dcaf56a719a2df4b5153e0dc9e5e8a69da42e1d40934fc527aa1ed454d2",
    "signature": "0x5623baeea23c2cbc8df19b0d556bda889ee027343cafb66f1d7a5e9d2192c9506c425effd4c7af7f2adab990c120433fb741a38edd2195b8aa77a80e9c9e4a0c1b",
    "signer": "0x569AD4a425B92a964d8e182094f4aC58C0673162",
    "userId": "577745560"
  }
}