{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcd818d3ae7766307d6e1ed88e96c2982d3247992af01347d7c69902d265f0495",
    "signature": "0xb0befd18a169909ff74a012f3c5376de8c56bdb8cecc852ebb4bfa2af3f46a3b3c17be04dfa720fd54314e5c1b908bfdb5e5ae6eb1992b4421928e60ef025bca1b",
    "signer": "0x102fa8671c4DEa87cf6826985Ec0B0822da0e027",
    "userId": "239334937"
  }
}