{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092973840",
    "entityType": "Track",
    "nonce": "0xaa7eefa04eae657b7327aae39fed0003989cb435db8681e3dc2c0d50a802c360",
    "signature": "0xf441960e27f4a5b7ebc3eedb13b849d119dc389629c6495cb82fed3c7f7dc8da41c2cac996dcfb5e5d68359d67ece4e5065b4c132a67c51cecb59e1a4f61bafd1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}