{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981093604",
    "entityType": "Track",
    "nonce": "0x5bd6abdbf8d67f4de3e719b704c10eb84d97f6832dbe74081acb986abc9daee1",
    "signature": "0x0fb2a8e3edb82341e560b78d9db0e77864d9884d91cb1ef7e443d18f459298006f8b253706637ddc8349dee90fdcfe6751fe439b945016640b6cb7c25d76f5781c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}