{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x62f580ef07870ec355cb977019e041c75436b30f9fc45a46fa903b7e736738ae",
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    "signer": "0x4D5454A391B2B967F678c28d6f8af657556ACbE0",
    "userId": "629707907"
  }
}