{
  "manageEntity": {
    "action": "Save",
    "entityId": "902874991",
    "entityType": "Track",
    "nonce": "0xe70cd756970b2837a2afd5d22961da0137c387e0979931666133ea349a26ff20",
    "signature": "0xe78eea217ce24acd9df75ecce5be53def64d7b310645ac363d539960ab0cbf6b6b674ebfad4e9e71d946fd9f562b6445fcb8232c2f2805ecfc8981972b48b4991b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}