{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xafe3353439d0e1632c6730e0f1c3bc8821fc6cadf21ed02596998b8845b6eb55",
    "signature": "0x00f813e8ddca6848ce9d7e019a9ae5c755391dbdb57f568c88ab079919070f6a3a998947f7f267e4f9030e3c8769f110fc8cd34ffc74a45a215eff051f3022a31c",
    "signer": "0x0DEd7E0f2BB86ee7Aa07A6c8DdBB8c794786a29C",
    "userId": "473938627"
  }
}