{
  "manageEntity": {
    "action": "Save",
    "entityId": "1532475953",
    "entityType": "Track",
    "nonce": "0x313f0edf198d8e8c7d15f3990f1bca0789fec220e7051f8dcca3e8da5db94cc5",
    "signature": "0xeb14aa050ec93ff46515e3b7e20f62ac471abf31187e6cdc3ffbbf5bde03187004a8c3250b5b997d584355e2c0d67d01fac82e1ec54793c347f54c32839370f71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}