{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf44195fef8fe95c78f9c312ae31b29b81cb8c44115af2b5e8e9542dfeeae5ff1",
    "signature": "0x4834e28e3dfefa7f8290a417a197423c60dedc9d961259f6cc09a30d10a1a8a428f0849cb294942eeaea287bc54c47fba35a52dcf0b657af17ef98b827f522a61c",
    "signer": "0xdAAEA36c089a1CFe4f77A3966D544130A02Eee4B",
    "userId": "41419721"
  }
}