{
  "manageEntity": {
    "action": "Save",
    "entityId": "140294347",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1fad8aa5f0dba070364424732925768ac125aa2cbdcaa00a654edebcb7e70f2d",
    "signature": "0x53c4dff929d404ffb38f42127dc939983aa8d42e8b0b2de3f75e4d3cacda2ad03b5b767241cd1c6635dc47bcf45f1ccaaa53eda6e50d2475b91d2982ca3faa291b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}