{
  "manageEntity": {
    "action": "Save",
    "entityId": "702551332",
    "entityType": "Track",
    "nonce": "0x82bc799b362438f178b9240bf710dac5acb4a09c049c2d3c3e3bfd5567eda084",
    "signature": "0x4f13b7070f63fc46d1d5879abf5750a95518a4e22210a8484c49a3f037aa57df64279f84721fb04f5cef8fa85d7ca0073658d05a1ea524a27e00a56cb282638c1b",
    "signer": "0xa5Ca6c6a8CDe087d3F6DDc71f2745F9787FED97C",
    "userId": "819530730"
  }
}