{
  "manageEntity": {
    "action": "Save",
    "entityId": "940009349",
    "entityType": "Track",
    "nonce": "0x7300de4d034a20a1babee9aedb8f7dedb319d5aa29d2b9dd0f0585cee7308423",
    "signature": "0x6715aea00d3ef8497a2111cbba23ab5b6911240c8b591bcfce8f8c336c05d5924d7122e7ef4ce55f7aedaa83a0ee01177523e559072d63999bca491b0721cca51b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}