{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789486073",
    "entityType": "Track",
    "nonce": "0xb0c2ba5aedd943a03dfe6031f772ed77d733c982508ec1a5e5d33e880a8cab86",
    "signature": "0xe234676dc2cd42e89f55074b06de2274e9322e051f3a02310b9a3478e363103042ff3bbfcbc94191898151f316f53ce7a5655c536fbf3fc276bd56a3a5bfdab11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}