{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9303e5452fc1a2f006a10e2db810c7b0d23fd4ff62521f0ab91f614642ccc5de",
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    "signer": "0xAB29B8DA3D6B567e0B313F69d81f027Dc1E9993c",
    "userId": "658132552"
  }
}