{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d2e2c182971e9e835042309035fd0cbd5bf989f5404a8c9b20fc5b6846f03a8",
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    "signer": "0xCF2E1E2F9C1b2f1F60F4100a9F32aA4D53a1368d",
    "userId": "240318753"
  }
}