{
  "manageEntity": {
    "action": "Save",
    "entityId": "315192",
    "entityType": "Track",
    "nonce": "0xd250a18ac90454240d49c20166c7baf48ff768f56faa19296432ead2c63b4409",
    "signature": "0x6226e7c6fc2c3a641a3c23ac224f34ef17c31f5f11c26ca296b493841caf3da2474787bef31f93ba986ebbfde30bbdc8d48cbb6ddd4950e2cbe246de737660581c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}