{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x42f42736e6f3fcd1aea8980b0a9d9733c238d474237943e81783e462c634d6a3",
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    "signer": "0x0327c1898eCaD00a338eE6C7741626B166Cb53A6",
    "userId": "374446684"
  }
}