{
  "manageEntity": {
    "action": "Save",
    "entityId": "1442134506",
    "entityType": "Track",
    "nonce": "0xb6ddd6901a01ebf5b28fc52f5799180527dc20e596bf3c5e097c4ad0144a9775",
    "signature": "0xdcad5354f15bf45d663c13e8938a14e516124fb8e9dcc2006b22820616d03e3f030e80b85cad061068a0a6957a8c6e7b8662fc54d4944534bf963913679504521b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}