{
  "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": "0xe157797ad07b5845bf1955b7462d9f3c0f3dab349d16bc05ad3636b17ae0220b",
    "signature": "0x21e54388ec6b8541e2157e67273d9e233aee6a9df9ace2f9aab040b718fdf8be7d90be226f3afed73c46820592dbc7d2b01bd50541625f6cab984b07284104411b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}