{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x25d7172c48721f29a742340769499fc5cdf4950783be25bd15a89ca438010c62",
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    "signer": "0x67c52ACfd4bB3AA1eE904C665CF4f7a87ff3054C",
    "userId": "174187428"
  }
}