{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xafc520000384be99ed46d7910ec7171f863b101463a2abeb234dfa27a89cdc3f",
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    "signer": "0xdCd646a0cD0410890c4847Dd128D4Ad1D37D20d4",
    "userId": "488405658"
  }
}