{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5129bebede7dacb2e0d3ad65aff1f54fd1339b8dcfb19fd7b09709b9dacf173b",
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    "signer": "0x29Ff1645fe139feAD6BE7F56CD25C402Db9d4dB4",
    "userId": "863212457"
  }
}