{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x04d6fe94832bf3d4d079d7f45e0c3df1ed323b04e3b16eecc1aad97f13dcaeaa",
    "signature": "0xcb964e8c1b21c57cdb138ac0a28ba325ff8864dc3560cfb63d8382300e4e0144232f5b770ca736e2ee059735462bd7018f1484b5cdb0c3cc521573cf8ad5b6061b",
    "signer": "0x993948A04d74C801C41F882e0Bd7D73d28fB5D79",
    "userId": "608405710"
  }
}