{
  "manageEntity": {
    "action": "Save",
    "entityId": "212896575",
    "entityType": "Track",
    "nonce": "0xd70c8a2e6d51437f6f57d8bd10da1d34bd09a26a5800e76ceb8a3497362cb1a3",
    "signature": "0xb29aaa963c622136e9ff9f74742935365eaa632b5a2824756cdbb2d09c74a0e03f896f6d349a85ddbcc21782d97bf4ff51c9fa63144dced9695744a5f15efe2f1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}