{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c5c68779cff528aba0e910b4c0ecc368c61d8388a97895bcdbb3281789c6b86",
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    "signer": "0x43295387a5Df98927625889A42ab17C4cb5148eE",
    "userId": "893996755"
  }
}