{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x530f2cd5992a863d3c349e641ba96a2ffb6610bdd77db9163513de43fa2aa06e",
    "signature": "0xb3684be6df0d730e28d9477ff4258327c0b2587cc8d53df2e78bb8b3f9216c910b51fb22735b0244b42f9e5a9602601aeedbc24f915d07bbced00bead95bf1731c",
    "signer": "0xaF500afaae73bdfad2Ac2b85e59D6C64dedF1FD9",
    "userId": "104017651"
  }
}