{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf5379e5c76db74e18a49d17362b8231d887b421b382a3948f2b4b4a16584f803",
    "signature": "0xaa13c7ffe4cf9688747efbda515f26798510726eaf9ad00a5e7ff9cb414d274042589b22bcf499360ae3872c2d1818909d9011f88f2f393dbcc6581a3aebaf881c",
    "signer": "0xFcBE4eaea370ec04dF09e224271FFeFa75F69C67",
    "userId": "524818998"
  }
}