{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078784354",
    "entityType": "Track",
    "nonce": "0x4c54963f945c6ef80eea84d2385e528eca925290d5a93f6c0ec30471deaccb0b",
    "signature": "0x57e68adbefc8929e265dca4152ab99664813bbebf4fd20ece09d73907f95dfe65c8cf8e656d9483bfe135b8236d5b645bbcd8b4cf6fbd8e49eba660608768a781b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}