{
  "manageEntity": {
    "action": "Save",
    "entityId": "1843372230",
    "entityType": "Track",
    "nonce": "0x0f734b35a2103994ad367cb138f211235565b2e2502f73a709894db7a76bc61a",
    "signature": "0xa9e0892e7b46a0c112db6edc505080ce6711dd95d0e0965878fd4ddeb335ce1865a647c527a0cd800811d1a88c55cbdb7d7ece98fe46e194aac994731a909b8b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}