{
  "manageEntity": {
    "action": "Save",
    "entityId": "1008976",
    "entityType": "Track",
    "nonce": "0x1ad5fabf38ecc03bcf110cf45baa5ede71ffc20843b8291f72660f5c8795ab88",
    "signature": "0xab8971f08f7d39cbf814cc3bd4864129facbb8aacf6daf67ab0499c8d6ee8633583295f092ecf74081d64e3e5919b96c214dd4d3210c331bf24b283861e50be81b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}