{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7336527a21c289c1da232c12e544c099bac8f4b760620542834dcd6b3318f97d",
    "signature": "0xba460332449b90f6f0cfe4bbf117deca7f8eae4049f23e65dc855f444200eef4236e6047faeeb1a27f808a5b481521ca1badfa4b0524df6592743e409be2eb481b",
    "signer": "0x6948e0418Ce2eE9cD054e9d4Bc50614964F459Ac",
    "userId": "415252957"
  }
}