{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf73e9de9c430d5e606d870259553a58ab0b02d13cf01a78eccf618dca0be98a4",
    "signature": "0x0a1581719c5f0bcb071416971b6694752fe4d0bd07251599c89e9fc44414fee2600fb16fda4d1d51ddfb6f8e2673b30e3f60f84062f6e7f10eeb9706b36713e61c",
    "signer": "0x188E4f1A49CB14A8e074657a764F5f614329985A",
    "userId": "695296818"
  }
}