{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8b71440ca644f12fd18ca40b763db6c37b1c73b6a20651fc0b36c6bbf9a20a6d",
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    "signer": "0x497Bf0D8409A56A58347f2226d45340c59dd7051",
    "userId": "58618452"
  }
}