{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0c64d8a0977c1b346287fa245d08522f9b67a82af812c255d7ad263c809aeccf",
    "signature": "0xaa2cee498144f39855c397f64a50e2601879dbe5ffb5dbfaa852b4837ba031ed6920beafc6c6d4116b1cef49b86df4cc84a9c5cf135e692d7706cf8776c7740b1c",
    "signer": "0x1F80B2f8b42B7a228a085479aa74F27a4d79a14D",
    "userId": "64586191"
  }
}