{
  "manageEntity": {
    "action": "Save",
    "entityId": "1859918336",
    "entityType": "Track",
    "nonce": "0xe4c5f0edc143a068da37e9619f12c033835c68c488fab4bb7e517678c2bffaf8",
    "signature": "0xc17a4625fb3cec80416e84c20e3b6479ec76e2d5843e8d3d2863a078c4b231a8622fa7ff5d802ef31d660d2dd40b4f9868e78113fc272e250887d9e9066859371c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}