{
  "manageEntity": {
    "action": "Update",
    "entityId": "960328121",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraj4wfal5m6zldyq6gfg7m2ycvqk2azcvadmemug623ufi2ig6zfpa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1873409341}]}}}",
    "nonce": "0xb650645266b900955505cd59162a5b1592062e311e6b6315d8dd609d1b536877",
    "signature": "0x33e41ce86cd9f1d9013b26cb0c6f735364c1dace63c4eef6d3ae7c65c6568bbe430f24725f4072b606d2ecef841c352d66e3c64f867e81c9c90cc1b52b3d671e1b",
    "signer": "0x66a164982b85dBC887E346DecC1dffBa4afD1776",
    "userId": "960328121"
  }
}