{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2bc1f21c02ba54c23b66af9b021c7ca0f9c02249faa098f638fda686cda34263",
    "signature": "0x0ea95eaf5ed9b6bcf50029c87aade97935b1d1e9ee196909322a075ed8551cba1a618338b25005c8aba2d5bed60a018687b8ba40079face013edb352d93fd5931b",
    "signer": "0x893f27cC599C8EF276aD52F8Cd0F780883C6e827",
    "userId": "590068580"
  }
}