{
  "manageEntity": {
    "action": "Save",
    "entityId": "710462",
    "entityType": "Track",
    "nonce": "0xd76fc4afd4c0fa120dafae57bd42555452e9af0a7b2e040d3d4badd71cf92ae2",
    "signature": "0xd34bc8ceb1e5c12b8b1aa0f7bf0bddaed15513e2ba5ba4d44a8fd769d86eff4c69c53a9a50d813d4e01050aab5bb6517985dd65d333a36218b44e8719fdeb2fd1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}