{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfaeccdcaea67b77312bce62ce7035dff3de17469440a7c15e968aa719b7193ff",
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    "signer": "0x4f4bC9C8F701deF8AaB6d581FEE2c33411F67E83",
    "userId": "490969991"
  }
}