{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x28d9767521959dc5ecf63816d58cf553d726b85bf5c4316cd43997f7abebb643",
    "signature": "0x338753651df7c3738d7e9f7ff0dfb320c63430dc5e9352b1bc59b2cced4d5379210a315ad7eecd3d75c135eac773ed74c9658feebec8733a1a91bf658970a0e91b",
    "signer": "0xeaB856Da67011891D5Ae4194a816e9c7299Ec2cF",
    "userId": "172926413"
  }
}