{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996310949",
    "entityType": "Track",
    "nonce": "0x51ad6f59423d52c1ee8d1c0ac15f6fa6627f9a52438e26921d4b4fd8477501d6",
    "signature": "0xbe0baf57a8e128ed630fdd427aa8975d9d2c439c0783e9c714f0acc70d43c5e1449e54c383430b4dc1b10b07174cc33ea533f63ca50cfbe06872ab903e15f5971b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}