{
  "manageEntity": {
    "action": "Save",
    "entityId": "313774",
    "entityType": "Track",
    "nonce": "0x37af05878447ce82f24f1e8219d20e8e6aa18e3ce2ce7a47ac1b1197ecf800a6",
    "signature": "0x097239315b16f3edf01de0ff4863e535965ff9aa51e755db476786849e17484549de6068dd4d570ee2f57572fb05513c78eb33864047c306a55a1621065dbe7a1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}