{
  "manageEntity": {
    "action": "Save",
    "entityId": "1757866287",
    "entityType": "Track",
    "nonce": "0x2a4354e670325d3bf8e0c2dfc7ede40d66d8dfa5b831606f6d339f27aed0bcdc",
    "signature": "0x4832b0fc22e9aa9ab4c069be5d717e6f88164d86987c6fc9f7f2f8a3cd8dcd5b146ea7707be3474b50116095f9431893cdeda6d9cd9aa1fdc6eb5037487a68411c",
    "signer": "0xa6Ba5354Bec6Eb3F1ca7aF150f79E8b437aB016e",
    "userId": "165827"
  }
}