{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdde077172ae7e9c5a95274e794d2edcc5581c38e0e19d421d6a666f8f70d307d",
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    "signer": "0x9e0ccd36c0cFE9BF939A6192442173A4d60225d3",
    "userId": "430995435"
  }
}