{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc92ee30a9f72500083715d1f610225b24fe7dfd0f6b36cb23784258dd073c869",
    "signature": "0xac749590998d552522fc60ab4164a6b7be536d4a6570ce2aff785cc3ab98cff115b89d1d66d31115e0d7dfc05ad9721ca83d5329cf74d7374844adea96b968bf1c",
    "signer": "0x79a237Bb7C1298A003c60115090825377943703D",
    "userId": "227769388"
  }
}