{
  "manageEntity": {
    "action": "Save",
    "entityId": "489029658",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x466af8ca414e3da1e87f5442bd19ce6ce3786e2db15e5a06a7912459fafd0576",
    "signature": "0xe9c106c47386a8b1196f2734ce9ff7dac7c1448b09ec2b1cef953fd56da79df94ecb3a190b67c3b9d7199d9e1bce49e34fd0bc9045933a0a49a04bd87ba21d061b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}