{
  "manageEntity": {
    "action": "Save",
    "entityId": "45365883",
    "entityType": "Track",
    "nonce": "0xeff74f02f083fc0f17dd644ceebd7ed00ba0875fc7790008de49b182a3b163b9",
    "signature": "0x83e628c68e46c1fc573dcc321c35d54da6aa319fbfd9608f43e08c236482a1d30de2904a90b275a92f8cf9440359c92c881c309ef757cf2629e3a275320410451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}