{
  "manageEntity": {
    "action": "Save",
    "entityId": "624065",
    "entityType": "Track",
    "nonce": "0x470932ecfa69a871526b59add9a1d1e58e7bac0b469ac8a7e9f7688b443b584c",
    "signature": "0xdb3f79655cb65a6caf1c764bd79fbd6fc0cdb100992a9fd42d9d7d4e286115ba30ca127e2ea356504ad27ac1ad4b9fd6832b66cbd20dbf21b9c4a42173ed81691c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}