{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662773704",
    "entityType": "Track",
    "nonce": "0xd0481da743b596cf4a7352db65cc94bbabb6dac14630ee159b9311ec6f8d79f9",
    "signature": "0x140771c87d082f1345cb95449918e76fcd9f7a3bb18c5414c13fd1eed8fee5727c502dc1d7f15811a8e7bc5c234f583e2e416ef6fcf8ae347e6acf7111a6e56e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}