{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc9f7d9fd3793be445f3a8830736bec181a4d677fca7af830e11c50501c602f5b",
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    "signer": "0xD3F0170aBf4a7ec16130f1Af3E569eEb37f5C63A",
    "userId": "837323124"
  }
}