{
  "manageEntity": {
    "action": "Save",
    "entityId": "2038574799",
    "entityType": "Track",
    "nonce": "0x525104c16e8c03aefd3829e031c20b04ce48f56a9b0e5cce62c5f0c708e7f543",
    "signature": "0xf6c458ea34f736fbaa9e3d216d25684bdafe8e0967c730478d53b11d832dae0253f6641a34ec86c10be093a93e7b085edea7583762ef8353fa1d91ea5aaf86bb1b",
    "signer": "0x334b140fE9d685A0b45ADF4b1666b979432E75c7",
    "userId": "550101899"
  }
}