{
  "manageEntity": {
    "action": "Save",
    "entityId": "686493600",
    "entityType": "Track",
    "nonce": "0x7d50a4b35b19e136e9c65ef4db99583daf71397e9068621aa1dc897bfe743e12",
    "signature": "0x54dd66ae102fee94dcfe2cc276c7a89f2c60c1b298b1753eb55b9e94eb07402f21a41c95d8720dcd060d9191b05e5cc4ac8d303c9a76f961db33c64d99c489f01b",
    "signer": "0x42e695462662E8EB1FE25c8064B83E233d0b100B",
    "userId": "586354841"
  }
}