{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd70a81127f4224692f33c932833fcc2941063f99718cdca3861bc417415a0e3d",
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    "signer": "0x750d73e4c4cF6221A678C12A353812D356Ce568A",
    "userId": "841855424"
  }
}