{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x47647d55279d2892e0c1f9bf9a7f8b15ba71b261b3ac6f9331cfac45e3e76c0a",
    "signature": "0xf557bb7d30b4dd934d00b6d3a6d22dabb17a489d60aaed2a1201ac9a847389cc2894c58aa55898c4a7fe238bd94657c760b0448514ca3ebbaf7088b1383eba711c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}