{
  "manageEntity": {
    "action": "Save",
    "entityId": "292535400",
    "entityType": "Track",
    "nonce": "0x62a09fd0140e7b92af8d329553fc54bef8c96785f702683f874f5aa86fe52a93",
    "signature": "0x83e0a38807bc0425da48d4162d3523f40bb22772de0ed500b62348386ddb1f157542975674f55bd7c3a22da0e550d545fbf812e9f53a71838c51ad4f4effdc051b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}