{
  "manageEntity": {
    "action": "Save",
    "entityId": "126734",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8f29f86d1714ad286d7b3f3d03054eeb5b381a514af75abd3e8993a9e81cd1e8",
    "signature": "0x20e59562b9ceccbcf994050afec6345c4b13abffc141c5a311c197b7519b53da77a67e1fd215ee7a248d4f49e01be1028e6beeef47dd7fa0688dd25e9fcf92f11b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}