{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x732f59863c252a7fae3c314b28db6040e69f2cd844e415a4673300ba05c30969",
    "signature": "0x84fcfa7f11a01e6686bcd5a3ac72c23a79bf330319d42963cff58e0e3d2e0a16310b947787039e1b8fd3df032166f0efdd151a88ecd6b89b77f5d4a58e98ec551c",
    "signer": "0xEFAB3332CD5EA33e9817aa57B32CaCb8Acf973A4",
    "userId": "407216161"
  }
}