{
  "manageEntity": {
    "action": "Save",
    "entityId": "405318502",
    "entityType": "Track",
    "nonce": "0xe36a115f61e7867adc9b135f5b2d0480f532c4241e76415aed45d8b654757456",
    "signature": "0xe79ef33dfb4df8191f29c86f42f5e7b9f943ca32edb123a44f43f04af95c80a34372bbdfb9e21eac56261df37935beb64ee2b00fd3b7892a869bff502f4f1f571c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}