{
  "manageEntity": {
    "action": "Save",
    "entityId": "573477424",
    "entityType": "Track",
    "nonce": "0x42d0ee5fe373a8dff0a2e9e2913ca2f7e4c7003a2c828472221be1db15d211c6",
    "signature": "0x85c818c605ca79aca0f12033f45da52d5d0761f188023fd75f242c8345a27cfb4aee005a5e6b86227cfd3d0344c272f1e11669305a3d3a09daee207321fd9a151c",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}