{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbf2b66fb0ca1127f78fbccaa2f6ccc8ba23486f1c1fe28d265937c63f7609ba5",
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    "signer": "0xb9E2EAf5dDf41Ad5Aa821ca9A0194a2D0aF7bD37",
    "userId": "655908934"
  }
}