{
  "manageEntity": {
    "action": "Save",
    "entityId": "811900410",
    "entityType": "Track",
    "nonce": "0x74d14dc68ca7a72122ce376fd5e9e8ee95a6d2c021ca131df6e1cd3b02aafe9c",
    "signature": "0xa1e7c5c56cdac61b09dc88bc89719577f873ffb42f399de1d0122d332d2ecc7f3270a27e692083d5f656b96f89f50352e13889dcdc2d9a527c785f8b0828b6311b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}