{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1d02c3911cf89c82e027ca47480d69883a5fbd48bbe3c024e76415255f4eab7b",
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    "signer": "0xEE900f272a7061720C933d4E8E605147FC4F2893",
    "userId": "844847273"
  }
}