{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6bae50bf0f39855b49b08b0df90a58705de4fc96d6fe790efe40835b7161b06f",
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    "signer": "0xE56F072937DD0D77b45b55A5e4c0915d838f879c",
    "userId": "225602763"
  }
}