{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1db56f36322d4cd17c649aadca7df0677f6f63823aa3ee9f56539fd59917da2d",
    "signature": "0xca6c382ee9f260197320e8ae72445947c5e334c038089865a75d90ce54a87b3b29dccf6cdc199e184575e0ca2924e25a498e3eec227f93448de6496a4a59a7211c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}