{
  "manageEntity": {
    "action": "Save",
    "entityId": "135898",
    "entityType": "Track",
    "nonce": "0x493b016ef72ba3e54b948d1d9b3b1727dc678c48294167971b3b5f27e787237d",
    "signature": "0x1fe8423244a75a9fe5bf4680a6737ec5b21f79355a6b802044fd35134fe08d0c002e5588fd68f9bcd697c4dfe315b3721fa492113bf8cf1b23f900d3f93ae8b91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}