{
  "manageEntity": {
    "action": "Save",
    "entityId": "1314320381",
    "entityType": "Track",
    "nonce": "0x2d7067aa4d98f84193baa1373c1e3241f02acb76a25366ad853fa34a34d9c343",
    "signature": "0x55ed69781c78ece1666784a707ae9eec21d45b22fae2dd2b1c40182e683a35907c075cbaacd0ed4d8563fd39a7654e5439afee02d6026fe78888a5696d493bbf1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}