{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040012",
    "entityType": "Track",
    "nonce": "0x7860ec80aed6b30fb5971860a29f934e0aa4047567305110639030b45102eb2b",
    "signature": "0x94c2361260f473970601823642f0358a92d6f23cd785ee949251a15babf2b65a162ec2f5f6907ec4cf667f2246c6039cd18a64c9f65280f0080edad2dbf462651c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}