{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3b424065a23703a9766dbbb245a04ceb8a03c8ea406011d3f55b6546f7f614e5",
    "signature": "0x23dfd46ab169ca4fdb604706f57c3e016db2f8cd0b89195f15064a0fa03a84ab50c82b56c8328f469c5638cb35037268365eed7f5b2f7af1344a2e133b34ec801b",
    "signer": "0xb8CF893bedBeC61F25914474312c4fBB6929A5A9",
    "userId": "513521095"
  }
}