{
  "manageEntity": {
    "action": "Save",
    "entityId": "154646",
    "entityType": "Track",
    "nonce": "0xd3530868a1c5cc8e7d70dd0fa3c6bd65b60faf0c0eeb74f56fb997cfe2bb1117",
    "signature": "0x6e9313bf498e43e3a4b37d06801cae2e13c36605bccb210c2f32caf186eabca554320e8021cd0b17075b03feff1e060fb1ccef5e746ac1c1a467177d0f626a8d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}