{
  "manageEntity": {
    "action": "Save",
    "entityId": "285509",
    "entityType": "Track",
    "nonce": "0x41682aafbbf9d294d131f617333a96f8563e78d1ec67ac001fb3f7b43b3da36c",
    "signature": "0x051064bb68e96be374fee214acd352cf6e2a15c512b4ea10bc179d3cc022173f5f4a5c3efa6e7e55598403510a96a9261fce3af155821c553a70f19e128f1e7c1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}