{
  "manageEntity": {
    "action": "Save",
    "entityId": "1744651683",
    "entityType": "Track",
    "nonce": "0x5e5fbe9e555f86feb76c03b34a778243228f168b14dd03940fcd308be3f1fbe4",
    "signature": "0xa9ca71d1ba7aa64f144f25695baa0b993a51c9ff10f5d1dba6e6a9887f5e81f57fcc6d6fc74212e8d3ff9ce8cee1c7b1b59f70169304f36e7dfa0310d6c1fc511c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}