{
  "manageEntity": {
    "action": "Save",
    "entityId": "1227138199",
    "entityType": "Track",
    "nonce": "0x5739f022bf53e5796a152c327f3ea87421d84fc6516fd6c40e9fb6fba62e1875",
    "signature": "0x72dca6844bfc5a43f87cf54ff932d1cf843fba747ef3916b7167983aee8f989b632efa8e5dbafbc84f40b8204bdf2d7988a830c60578760e5687f6ecf0f69c991c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}