{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x648277120af524ad11eec85f75dce5bee5fe6aceca3105daa5d5b993d95f0a92",
    "signature": "0x6555dea1b4c3b41dedc3d4cfff3e2f235ca451150d404d65afd7d9a88ab61b80567f14ad76c7d63f5ea27620706b12e6b96edb11b38c8d814bfea6af264daedc1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}