{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc3cfbae1ee49761057fa731dce63c79cf59bd41b6de72b138735ee6fa307e522",
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    "signer": "0x5Aff920Ac250359b44846F8c1CB387024f6EF410",
    "userId": "718980832"
  }
}