{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1cf9f9fe3d48c71bb265475d87c57b961c6245021fe9af9fae9dc44a09e903e7",
    "signature": "0xf8601d6b1deab260ee54729ee0ac109aea362bad068e63f536bac84d303d023b0f6a5d3e4b36468f5d5ef343dfe642cbd416a90370930247abafd86e859ac60b1c",
    "signer": "0x77c7af1b3d2aC5c8D919AEC90f030b2770f9c7a6",
    "userId": "620178250"
  }
}