{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x97eb7dd4701f886ad53c054607a342e109430e68b89bb1d3b1d613c2baf65465",
    "signature": "0x1a555fbda4b8acfd91ddeb010d8f37b348dcbdbc2e3fd5575b037746417f84a65df7bc528aab0c3b43d9150648926b0e800442e0bedbb7d153a5c276e8d1bc241c",
    "signer": "0x542f3cEd0BCFe2401a4326B046A530b176Eeb51e",
    "userId": "553120706"
  }
}