{
  "manageEntity": {
    "action": "Save",
    "entityId": "614586",
    "entityType": "Track",
    "nonce": "0x723802ccc165dc85905327033936b2505d5c88fbeb51d80756296a65e0288445",
    "signature": "0x0a367e69e9c5691f6e3bba0a6c2bcd1dde188fd9749ff402d8aed0dd89fca8075979e5ce01abcca3560969f4636e65aea5a4c46c61ffdc32573a96fe5bdc39201b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}