{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105206543",
    "entityType": "Track",
    "nonce": "0x1c59294bc8ed99f627b8f58205c1d62421ddd9311ec602d9579f3a052020c8b2",
    "signature": "0x68a3ffce7ccd62793bf2fb7d36ae7dfe399f3572e36b29b3b63f90d2329b55f1665da6760d6bd3285343ec928d08c6884790e0bcd93fecd4ea248743acba618d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}