{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbdb3ea60a9b6f577c4d2096b54b7e2405c876a10ddce324c5cfec603e6a39a80",
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    "signer": "0x694e30450c1b0693cc7FB530Bce95f6B6193D366",
    "userId": "427045309"
  }
}