{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdbc79caba91c3e4f214c3cf48dbc1608048088a96ccf0fba6d6bc71205ffc5f4",
    "signature": "0x55690cd92fa5334a4dbaa34f0a0f43b8e625a2075fceb6d088fdbf37543b52877de65a941e3f0f98e6d6e11bf95274b8ff60c431515fb7a700ed1fe90d50204a1b",
    "signer": "0x8558436301276E3C24E450295d689FF36F1d88A6",
    "userId": "788879262"
  }
}