{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcbca041412cb6e5bcef010d3e2e578f45ace8fbdc1ad424335b8ecaf66de3cc7",
    "signature": "0x8da94fa13f15a4ff20cd02a432b838f6755fb4e10c92acbf7fcf358dda95a1024c9d77b205f1d43bc4ba29c11df957c37011948a06d6d63dc0705ff5c8ca07061c",
    "signer": "0xCDa375200575E30227163D9E606beB0e587ce854",
    "userId": "408678644"
  }
}