{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458308158",
    "entityType": "Track",
    "nonce": "0x4d3afb2f08e46b59b7f63271331aadc3ac193b86115ff00fbb2f30ecae310cb8",
    "signature": "0x4f2ac66743e15eee6e54fe52d6cbcf304391d79ac7e5df32267ee4bd68614f3320432efc7851fdd85a07f744288b359372763b01f6cc744602063aff9c32c03b1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}