{
  "manageEntity": {
    "action": "Save",
    "entityId": "1624636523",
    "entityType": "Track",
    "nonce": "0x5b7bd4ca0b7dcb16fdd7f768f34ab07cc7e78258ee64a302aeac6bb87362364a",
    "signature": "0xca44340ac405533ebb3a28d7866b40ee6528e5b70f31554049745128782548164614bc31365ab6667ef81dcd631bfbd6b7b3bbfd07fc04f92f4446d8f0ab0b851b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}