{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4aed9e33bec8ec12d6c512081f40c968d93e81706f7014941dfadfa3e9b9e59d",
    "signature": "0x2c406d9c5924717c1f08b6c9aa09ef7ca1e582ccc9341e2fe6c15d7b9180928b4cb95e55cd6a514797624d1e4d683ddf13a16e28a45788a54c1792f6d70b3fd51b",
    "signer": "0x89fee20b326EE829A0A4ed25317B9B3A735387A1",
    "userId": "143995385"
  }
}