{
  "manageEntity": {
    "action": "Save",
    "entityId": "658973648",
    "entityType": "Track",
    "nonce": "0xccb6674d2f0dc556669f58a7b3de31994634791fcbb1bcaa3575c592efc33bcb",
    "signature": "0x9949946b519e912d483ac0d5a62b1a3ef627de319a3d112ab642e680545a19ad50c84b81088dea0222bb6f2fedf3a924cbcd00ed77d084ffdec8e535bea13d771b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}