{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6b8ae41d30bdfc6d01e86b97a7719272e87a74331ec5082836e71c4a708d5cc7",
    "signature": "0xede9f7853d32edff998025a4e0fb9da733ec74da55e8adf327bf8c134f2359ea3bd6825d9cdee8aafb35664b67adbf0869ed09ce95fbd2382532b0744db909821b",
    "signer": "0xFFC5dCB45B1826f1cbb4062a3E63151751CC7C2a",
    "userId": "308159083"
  }
}