{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x502b69aff6a0b386e1f8deb61452905ab583d195364faf7aabd657b3e8573453",
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    "signer": "0xfd6fA08caFa73194F0ebBb3f60d6B15657185a30",
    "userId": "745940006"
  }
}