{
  "manageEntity": {
    "action": "Save",
    "entityId": "1004048",
    "entityType": "Track",
    "nonce": "0xfe466999e9c8fb7540e2d3f0e0b4138cb5f7b35413ab38a97a66abcfe2fe22a5",
    "signature": "0xbf813ee263d44c5755e78596707e861beef4837be59b3a88202ae5f7b252a09b32f1911f111cbb48d337d05010067478b5701c8df3b43ca029da5e8133ccf7eb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}