{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xba8a758e7c941380862a10045ebdb8aa2c1f581a9e32a87c77115e7397eaf2f1",
    "signature": "0x6152507946fcb76d5731aa910ba3f9e9603b7ed8c91f801754dd71e8c121c1a460d116d4e1dea4c8902d98644721f31dfcbc55f07d8057febc874b87cb68d2ad1c",
    "signer": "0xAb988e2C48a71289c0c9a58a2Ce3b69B8531d518",
    "userId": "532463224"
  }
}