{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeeffc7165f45e28fbdfbea2f9a963c6c19dbfd3061be97b9df7663310c52c5a7",
    "signature": "0x005175f3f75108bd52dc942809a63e16c3862b43074073c49d594f431ac30c8c05e650f82463202a2a08ec038e897e803abfda3946aa4712a0478430389bbade1b",
    "signer": "0x862060c02F28f6984692E1Ab0f15419eFdc91D0A",
    "userId": "321032997"
  }
}