{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb4f780edfe20be154785e5f6f07638861592424df2e0fcadd249bea07762044f",
    "signature": "0xb72ef1075fe860fd8428841b8c7a62b50b524e6a866bead093f204a4ddfc880669f78d643f991f1e894f34f4e446b996ef7988b6ec24485a7a1bbba6a8ed830a1c",
    "signer": "0xe08C71DA3e0c879D36bb941Ad5D914d0a004Fd1A",
    "userId": "506796662"
  }
}