{
  "manageEntity": {
    "action": "Save",
    "entityId": "263156019",
    "entityType": "Track",
    "nonce": "0x0f203d25af009d3a406b0409e3dabe73c96c5b64251d20383bb771a64868af32",
    "signature": "0x383ff3c9a7c9f7c3b5d6b8833f42ef6b08b670d7f74b130bb953bad8586acb920e92cfa2ce045402ae052879b119027915e72816d9c1f614202cd46ce02768811b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}