{
  "manageEntity": {
    "action": "Save",
    "entityId": "791302477",
    "entityType": "Track",
    "nonce": "0x4f6b3d9560c7ed4dc86b804fe311e2e25c39053d426b3f12aaee5b864d64d750",
    "signature": "0x7442e3dc3a6e15f02cfa9484c4448ea9ccd1d35a7e6efb9e2721ad578500d99b20ce70dc4677339fa95fadce2cb038a1e36737cb686dd9602036a1e64e3d9a4a1c",
    "signer": "0x2F1E2f294c3e55dbeFEDe10ec5A6D29646572668",
    "userId": "478987064"
  }
}