{
  "manageEntity": {
    "action": "Save",
    "entityId": "849482224",
    "entityType": "Track",
    "nonce": "0x78461a7bf445c0fbec34a9368de95b14bc49dbaa238a7c9df74eae32b5e3a377",
    "signature": "0x793f71bf8ecd3c7b2e69d5181f50761a87b99beb5d3689f131bef3f5e602110971b0640371d8ee4c974f567530c3eab4719cb644e427221c44d91ea402c8d1981b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}