{
  "manageEntity": {
    "action": "Save",
    "entityId": "614264540",
    "entityType": "Track",
    "nonce": "0x14e9635e414b84a512b092bb280de9ee41120944a52323efdf8b002708a61275",
    "signature": "0x43ac6ae4334210b395bdbb4342db7a464c4d9aca8094faf7acaabe9f7e8bbfc02584a84c524dbf93aa5bef88af5eb1bbb0060a55acf94a655ae808d341caa2c21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}