{
  "manageEntity": {
    "action": "Save",
    "entityId": "1042824",
    "entityType": "Track",
    "nonce": "0xf58c21f16ec4b483a32486beae9332ef9d8fd1c13d03765418b28afc828d6037",
    "signature": "0x8ad2eb630d631bd9b863ae167de78a4b739c1505fe96d9cfedb4bea892472f7328c4ebc00bee5e98f934c3fa8e9e49214caf70b004e02751fa701801829bb17f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}