{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913371907",
    "entityType": "Track",
    "nonce": "0x166f404a9090b1b705f1c3a0e2c300bbcaedce4c812ba7484f467758cbade4e1",
    "signature": "0x8e67aef2236c71752a8e238a9cd77a8559886332d18c9cc648db4e946033c55062e5e80ed2679d007b939bcc0accb2d36b114898492e0ff8099eee8cc7006a811b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}