{
  "manageEntity": {
    "action": "Update",
    "entityId": "456087321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajopzcud4mctalbfvhelhsl2wxxwj5xzu7kcabjolx2bqcmjqjbuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1053100257}]}}}",
    "nonce": "0xb8d8e43ca0a5b980cc0d2f62ca3187908ba18c46705d7953c92df951a1ed5078",
    "signature": "0x91f0ef7c3e6f0023bfc14ab51891e551f14069f10bd7ea02cf4a569b11a70c7255f3bc83cb1235e1a7133432efeb22365198e8c7997039074a51ef678981ee231b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}