{
  "manageEntity": {
    "action": "Save",
    "entityId": "1572333567",
    "entityType": "Track",
    "nonce": "0x950e0dd750725a169178b3c15e7f1032e60410d00b9a65c8c41d52c59e3dc087",
    "signature": "0x36e4df6e023586b74c651164f774f2b2f9012f07e651fbea811c36ced305e60a69aa1aab7fe060ed559e02293ed41af42b8cebad31e696c97d5aa344a6ce383d1c",
    "signer": "0x1B1C95011ABb178C8e4b6F7bb60185dE60D1C8A3",
    "userId": "208538212"
  }
}