{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375220978",
    "entityType": "Track",
    "nonce": "0x1d760c00c2f813e4e4ab47be2078f37425e470b34cf72901faf999b3fc4b7736",
    "signature": "0x27a54c874b7ab7b9a65872db146a28fcddebdb0f69500b9f4e43bea163e3e66e705d8b412d179f92ed659d69503c792c33cd086e409e483a734ac9c3d371131d1b",
    "signer": "0x71114Ff581aA73d1F4b6429D7713914f10e8e90B",
    "userId": "894513731"
  }
}