{
  "manageEntity": {
    "action": "Save",
    "entityId": "990055",
    "entityType": "Track",
    "nonce": "0x33df722bd8b42ab6e1588d729302198f83dcbc015ad7175ea7f0a2069f25c2db",
    "signature": "0xd3b0608c69c9adf9697eba7a078df1e7b9908af82dacabf991f35ecce79cd32769432db75868f16c0ee6809ea91a5df3768eaad989e4bcbd8023d392cd4e779a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}