{
  "manageEntity": {
    "action": "Save",
    "entityId": "1173715779",
    "entityType": "Track",
    "nonce": "0x04c36cbb5d73f61811381f80ea5893ad1d8920084bded7b66b380a699deab2e4",
    "signature": "0x8e15533fed0db7f72e8266b3e92ab08e45ba2e3f7579d2adcc14431ff9fbf4da41f0b1d2a4656925329d35f08d0e69e3379e9d363c4c71bfb7693a73c744031e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}