{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x875fb5458a94dc1227c04b3e01927ef94b9e9a7c9913025604c56e5b9353754c",
    "signature": "0x7bd1cf8e45689dc687faaae9fb351f6a58f1bd6103885869c50e8feac6bb347758a2c16cfa6bca40463a86342fff0ffb09a9d430c30cae8b9ce3efbc46549cdf1b",
    "signer": "0x8659eFeD52fe64Fe2856EC51b845749cb08fa0FB",
    "userId": "570816621"
  }
}