{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0d6712593eeaf87b5cf6c56836e756db3abc12fb33f5b230cd7b15a6e30ba22",
    "signature": "0xa014cd50b0a74503fe2fd6c52ed0f71da0362f12d1c9e22eee2726d6ac320b242be6dbdc4377d881312817e95075bd1b8f7b950ca94de9304398333889c5a6c71b",
    "signer": "0xC374083aad63317b8E2d3e0cc6E9207327178A02",
    "userId": "576389617"
  }
}