{
  "manageEntity": {
    "action": "Save",
    "entityId": "232573413",
    "entityType": "Track",
    "nonce": "0x5eb83171882a11be619d98674662d899b02e08dc1a8ef8bfbb4cc06b6fbc87d9",
    "signature": "0xfc81c3593447c85623933f3ab17bf33a9cb736d50a0d2300f13c7cbfe22ac9271e17e56556f39401f66e58294e6f0bc397f629fc6bca649439116adcb2636eb91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}