{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814240971",
    "entityType": "Track",
    "nonce": "0x10947205a27d6e1ba31d174934d0a57d637c3daab09df818ce31553841559c13",
    "signature": "0xc4141aa11347e32e0951e244755d5391716947a8f47c179ee1d475cdb3a860940910be4dc1dae0b1c5e420ce61b973dba704a671c2381a8e7e5239c5b21676771b",
    "signer": "0xF2c19977A72e7f63bBbD9063748E52c002b22f6b",
    "userId": "957488166"
  }
}