{
  "manageEntity": {
    "action": "Save",
    "entityId": "75814",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d74daf1060ac2a8e51fee158152d60a0ebdc77ff240512b6843b2ed12e2f9c8",
    "signature": "0x74066b03bb94e900027f558cfb5cae7af12b50f52de3faec64b7109fac16acf828d081c6ab219d0ec5322a50ebe65c5fd51ed9c374ff09cfde16878e99be1d3f1b",
    "signer": "0x5D040c7e172B07431383B4bd6Fdd84ed67B8Ba0f",
    "userId": "508547804"
  }
}