{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f2cde25925d9cf93b6fef00c46d027062633401a50a188d0e38d14e4b628308",
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    "signer": "0x984EC72589412a392cB3451eacc39b4c21aeB19F",
    "userId": "147459552"
  }
}