{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc0c10d159099d8290a68f09042dbc6e06a68c361b511549d98f88afe9acab171",
    "signature": "0xdaf09d555eb2d96f58949c46524793050e1e9f42ff63e12450027ab1f5fd23490a37b25e4e504ee6238b6a40162f76eb95e8ffe1292a3491ca9435056510e38b1b",
    "signer": "0xdE7D939d77F814cd2E8B2335A19e6E3d0231A45e",
    "userId": "584697991"
  }
}