{
  "manageEntity": {
    "action": "Save",
    "entityId": "1286776809",
    "entityType": "Track",
    "nonce": "0x2b6f4bd93dd3faea2aab6dc60fc83829076f0e4289973e4845d5e7e43cb26785",
    "signature": "0x1e45fe9941ad3ac1fae06e72551b5c3f22e3db557ed51b1d475721c3db9843b36f2ad1c879a4361ccb2bfec8d7a71d39968e0ef3d4cfa39ad81445a46edacf071b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}