{
  "manageEntity": {
    "action": "Save",
    "entityId": "406435",
    "entityType": "Track",
    "nonce": "0xf968f0b75fec703179cdb00fb6c0ed3efddd9c929d6da4709ef70f015f87d080",
    "signature": "0x890a3cc7ede1f4c5b830ea20392614a55d10fd6efcfa1db035ae2b18655a346a19c0e1dd6519bdda2ab01d737dc8a38ab1911067acae5c9e6add95916a9f78781b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}