{
  "manageEntity": {
    "action": "Update",
    "entityId": "599428901",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera5vlyvqx25bbaje2bzkx5kxtjrjtiuzfnqjld5xy3wxfyixmdu6xq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":197709728},{\"type\":\"playlist\",\"playlist_id\":2001830423}]}}}",
    "nonce": "0x4f18da446035ca273ebe3f83fd6f8330e38f49e4dbd3ff5fae8b8956a42f3a60",
    "signature": "0xd4c33790730ec68413f7949b82ab9e8b0211a754a81b40af5732aad4f1b9b39f7deeee57c36f3b28b86a1e2151489ab2afa5910e7087b158cc351e051291befe1c",
    "signer": "0x2e16aEAD8DD93b4dB416EC8F6737547E2D945574",
    "userId": "599428901"
  }
}