{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x58dd987d164024b5fb052ab0d943784df8d1de423a5697c5f6ce47d301128f94",
    "signature": "0x97de7650ab6cac795ea61b7c294bcfb3aee53eed650b3e2c6f34ae378698a5086278428ad72d938d0d7209134a76dc5835038053a67c80896dcb6f79cd37a3691b",
    "signer": "0xd3d8c91870B94c11c799E606f806B055F5703c7c",
    "userId": "552726984"
  }
}