{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1cf7d7c8ccf95f33485b4520b1bfcaea5443dce567fdd878155fbc7644135a0d",
    "signature": "0x5ef51d05db0819c03928572b9682dbe9ea85d448a88a9d7bdb1440bfe27ab6b6088bdfe541cd1e268aa9d869e0d1878d8b70f0aeecbd7744cd107459ce4de7491c",
    "signer": "0x0bffD2D81009789917D71f317AFaC8aDfDb147d0",
    "userId": "756207441"
  }
}