{
  "manageEntity": {
    "action": "Save",
    "entityId": "306460",
    "entityType": "Track",
    "nonce": "0xd23bfc0b990313e6959ea07fa78f94a63f2ad77eb7de542ba423c5cc066cf803",
    "signature": "0xd668fc59233ff3d7b890890cc0b091b918efe0890d3549b6f5fd08fe9c07a838788f9eac676181a3cd56160395a9f8385ef701e96a6f49521cf25e5edd5bd39a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}