{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2c2eb5608a773f94fb8b795d595ae22efea5da8a6915ee85eb2ad34a7f315908",
    "signature": "0xe3a32cfa77b20e369603750735e97ad9c92f79b6ba9b5249a401e5db6e7727256ae8e3599da87444f0ee3b1c73ba0e544627d3118837cf82a0ab2916787d4ab61b",
    "signer": "0x5C12B048176801F55a785616363eB0910c647c8e",
    "userId": "851183788"
  }
}