{
  "manageEntity": {
    "action": "Save",
    "entityId": "927802805",
    "entityType": "Track",
    "nonce": "0x4a8b6af2cf45f1a50339b65b4595ccf1033dd6d5df5d7d40be682e945802f1bf",
    "signature": "0x64b3d6211d9ac01b65f18ace603af8bf144fb04c8d0903b41b2737f8fef656687c92d6dcab5e9dcd260ce2cc6b54b64d33063cc1f10745cc9bbf909b48494f741b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}