{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc00e044887c21b34ccdd99dd28f1f8511bd64fccaae5808191c550388b21805e",
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    "signer": "0x5D6aA75D1AF97D85776B61F02b335AEe91Cc2F5f",
    "userId": "284052510"
  }
}