{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x391bfcb885407f6371edcda96a75526e1529d3abe8bb30e13e1bb7cc8bcec646",
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    "signer": "0x64eDE648789ea631B348704eE66B261C40E0475c",
    "userId": "478634024"
  }
}