{
  "manageEntity": {
    "action": "Save",
    "entityId": "773104",
    "entityType": "Track",
    "nonce": "0xe62bcbf6e6b85e67e179ac6312c6d1786d34d026863e7e8783c4f2469ff36db3",
    "signature": "0xaf4d2635e770b182a25e023225d69b4fae6f2aa5ce8c44fb3eab9fff50cd701c4f60ac3193cadb3d8ecb72b51792cb2e8a03ba3b41761051d9f085e142ceefc21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}