{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xce8757c9137a68627e0898ccd57e9fa5fd5b044083572abd5fd18913c22cca9c",
    "signature": "0x89d6ed7f88b83c869fd8b6e8cb48b7940888e44d9ca9c1774d2a096d8c114b0e2ca39c9e9df2686d7dcc01d4dea8b8671571ced63c14a363412558a7ac1919571c",
    "signer": "0xEaeDdB5f18CEFf9Cce09145751aA90e015150947",
    "userId": "335674615"
  }
}