{
  "manageEntity": {
    "action": "Save",
    "entityId": "63370782",
    "entityType": "Track",
    "nonce": "0xcb876a6713dd89bc6b0cf8bea2de176b95610183f6827e724cd32ffc53886fe5",
    "signature": "0xe34ee98a9d86347664a5ca4e5c810295ec5cc836e878da0f69c8a5907a95efc507ad1fcd58f6f89a1def875f45cacc9404f1a2c2344a4aaa0904c5d8930a7be71b",
    "signer": "0xe4AAD20D955e4cee216981C3327c25B95aC07B31",
    "userId": "413210362"
  }
}