{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d7fd1394f96e5566d2e887dd255d0890709cd3837e5094b45db0183d6c85186",
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    "signer": "0x5A20B981a29D6e5E84F8b81B0c5b32304994e650",
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  }
}