{
  "manageEntity": {
    "action": "Save",
    "entityId": "595042446",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1fae36f60b66a4123b525bfcb6e5326adfdf880ffb2bef6c082e6aec6d186ac9",
    "signature": "0x9eb319276192b4ed8b18efd93c5a94eb91f74ac80a86b54bdc37fb7f9d59ee0105aac48e316e6c0d0130df42aa1c75be0d6243a21f07095acc9e1e3986b4f4cc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}