{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd369f9147598ec070a6a374d7c04ca34256acde42ec220ee8e798daceab8a7e8",
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    "signer": "0x0a8144ECcF9C2FCa51752b2ab83825956CFa652A",
    "userId": "344204229"
  }
}