{
  "manageEntity": {
    "action": "Save",
    "entityId": "368429",
    "entityType": "Track",
    "nonce": "0x11937da344c530b1b1564876d388b5557fd2d29714c84fb5d163b80126302c11",
    "signature": "0x74eaa63b5bda66a14acbffc9d237017fa6f6c97318b9945e6baf63f246b9980c56c4fc2c1110174496e865da48dbcebfe916b30e80228edf6c3d2a6cf69ed1701c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}