{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ecce5550ef914a6a4b9020f7e02156338177ad601184ea173f8036624fc7432",
    "signature": "0xa2bbd6730f5d942dc1a50e1f710c269be7d21b5696966f83d0d15a91d1741f1a276878addbe0a38612343eb7420b2931876d9563b1d9c7d9325349f7ca2e074d1b",
    "signer": "0x7276aC2A2567A39A2393ADC16cA2Ce34039FfD3c",
    "userId": "598977284"
  }
}