{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8d3f65270ff381f5480e8f42261695349028a4e678dde0066a3aa13b84db627f",
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    "signer": "0xEe3905136f4fF4281aE4d532C5B3c71d4C5E4cd0",
    "userId": "287318706"
  }
}