{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb5d4fad66673131c4e61a13665a327096bfeb08145962e1c4a6076d3560839c5",
    "signature": "0xf01bef2180d05731ca0bbc3f0f749b3d8bb6ff8d4204b14a5f0f61dedac920557e09535115ee81ab0c7795f9ff9c1858e832452efc2b814de28b3920600476ee1c",
    "signer": "0x39Ca2c007b324e8dCa41DED8B5828033EfE71A80",
    "userId": "925041154"
  }
}