{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbdc98d7457e8fb7ab673c258ef045c205b998dba44ef337d914a40178e0c67ad",
    "signature": "0x63f308b449eb38b7db19beb5d4f87a24661a3116be2f0fc7442f2deac35ecb7c0bf32ffe36db3400bedee6b760e9de81332b5204a68d8df40017fda82abdaa3c1b",
    "signer": "0x99D2cAb0450e06Fc332e20e4dC5C8f67acDE5407",
    "userId": "949730142"
  }
}