{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462493558",
    "entityType": "Track",
    "nonce": "0xf4e6c939cd649aeb06441938d66273d521c9e050b67b8dad2f6f3514591f8cda",
    "signature": "0xb0dfdab57a8b9c5e947b8d101e3653805d82ad17fba776789f010ed158a9296b3b35747e6fba064cd19bd253d36fb5da3d7d0f1b99c1f63b167183e697939d351c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}