{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745292776",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x33e455f8b067e25108a518bd0aaf7ea2cdab452f4ba99c2d3e51cb1162fe91cb",
    "signature": "0xa98c992cda864b22b7cdac61bf4173362026e9e297aefbea5c8cd28f1472456533aeca90ec97bcc739d7466bf2cd0f759549eb0450f78368d82d5914db889d911c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}