{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7ec36ed0061b985d656b1e4b5b9bcdff327cba1d2c8d81825ab78cb5d4dc2650",
    "signature": "0x62bf821d229907a5a85501616d5d11adf8be05ad8692b87b542f9704eb4d242c6e1b8f816cb48aaf82d7a0287d6b20285623fb43857e31d2bd06cd7feccc88001b",
    "signer": "0x6b7C70E42C944c78a305b0Ce56D40D43c811dFe5",
    "userId": "834623709"
  }
}