{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9407acc12550b3542c663fb018fdb21d073ba5ea21b0713fb8e3f3badc9ec691",
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    "signer": "0x335b8cFbf49f09F41aFf9BF281FC4fA179574606",
    "userId": "274103904"
  }
}