{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x346b6a55c4a4f24bb241f380518df6b354c118c21bc20e2ed7193a70bcda4966",
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    "signer": "0x4d8B00657C2a3A08D362c695Ef7532cF78048EEA",
    "userId": "41995498"
  }
}