{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016005200",
    "entityType": "Track",
    "nonce": "0x7472fd51e55c41372e5bac7d34a924dd10ebf03f64d20e3f2a2388d8988ed50a",
    "signature": "0x014cd456f579d35d7fc3d42444697cee275d84736106b10fea1a84add5f79f6b4ad8c6bd5f04a5698de34e84a94ec73d36653d0ceffe20c82cae04f20657bd941c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}