{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdf9a0514f88e67dab40222e72d4201c9b5343b0d349ce94c9363ad06e46c00e5",
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    "signer": "0xEc2A8Bb991A41f3e5eE06134fa4B6af544201e0D",
    "userId": "995945935"
  }
}