{
  "manageEntity": {
    "action": "Save",
    "entityId": "1545110748",
    "entityType": "Track",
    "nonce": "0xb63a8213a22d75c1b204a2aa7dd053f72bc679b87f4bebe44c0af706d48de05e",
    "signature": "0x8f77cdfe58211b07bc875cc38e3a8188e8a27e5296a0b1bb8c9e1d0f7f134b145a2792892caf921c2763656a822105126079a43214b3aee2831e5566c739918b1b",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}