{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcc8d319b50dd4de02f4773e5266c8a70bc8d16c31e8c9cbf528f01f197c203f2",
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    "signer": "0x0E491F52f82815182fa02FB40bD2F154a87fBBBF",
    "userId": "873019989"
  }
}