{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622165946",
    "entityType": "Track",
    "nonce": "0x2bc77c0235a80a9fd5c3064b7048cf0c1673d35b0d8eb0565805e19440b4f165",
    "signature": "0xc311c6e73577255a4c56713be9ec8e3aaac40d669c1505c588a74f7493f9bb294d5db527a2836226478ddb3a0b7d8b54234e3ce1694065ba950468f3e03ee9481c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}