{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5acc64569a81511e1c264856c6fa35bca827e9ff96d53297692c8eb42a832f59",
    "signature": "0x3a13161b0294ff23dfc55658202a8f38967679bd52d4667acac9b8b0d383300019d113262335221fbbb8b76dba24ddb8e577773b75e1bbc08fda8282198df1bd1c",
    "signer": "0xE6f8D066d8911cbC0456Fd7fd7050C7ACccc4e4f",
    "userId": "777613722"
  }
}