{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x12a878678fd07038477ee3cd4421b87708fe1404e3323b037fd1f66e886953a0",
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    "signer": "0x1E1d3E04188D953f557ECF4E23e1460BdEE5fD35",
    "userId": "107839204"
  }
}