{
  "manageEntity": {
    "action": "Update",
    "entityId": "350255884",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbf5712b199c9c43d4558485cd6da54b2a5f6adf6345cfcf9c9428566f7dcd2e8",
    "signature": "0x81999852155f1eef0e52a760dcb2a4887ec57f6d0371c56aa5e98ec023aa6567164d0bfa048f64eba020ce1a0fa3a47e0063526c4f06ac8148ba3ca089128b951c",
    "signer": "0xb8aA4e7B0108528a09b04945Fa761C98BC0D6111",
    "userId": "350255884"
  }
}