{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd9ee3194277d630d2ed5ea61fd2ea2937ec371109744561fb574ef9a19e750f5",
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    "signer": "0x6Fa6d440e86a96aE9f12263c1b1383ADaD405a77",
    "userId": "665688505"
  }
}