{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514335035",
    "entityType": "Track",
    "nonce": "0x670b1730a8c2f262b3b1972d06e382e134fa1e75cc8c7803599fa6a765455377",
    "signature": "0x6137b25907594765a9a25743fc86924ac1e16f9fd002c87c6c4097cf4defecdf6ee47ac574c1f3b2adf08c8adf0ed8715248230b2c1e310c23153fe1cab872481c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}