{
  "manageEntity": {
    "action": "Save",
    "entityId": "845697092",
    "entityType": "Track",
    "nonce": "0xe68088ed2e7b9824e87ed1f363df43062b38feeca431f608e6936c497a59d583",
    "signature": "0xbb3f749baa68800b0880e8d9741649718126afe77582519af91acb41ade4dc870dcdf96e2ad64deb2cbf2fbeaf0234bfccd0a249c93491f1a220764bded16c591c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}