{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x332fc21c09e9f0676cada1d48b6dd2298c606d45d25e3abb5345b928e85736aa",
    "signature": "0x26ef5d0dac6e32995df7688a419ca485569955e6db778614b8638dcbe5182dad280f1bf3c16da9378b37a304639a20ae5226966ee4d57443125d74f39002ce3a1c",
    "signer": "0xEFAB3332CD5EA33e9817aa57B32CaCb8Acf973A4",
    "userId": "407216161"
  }
}