{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393997001",
    "entityType": "Track",
    "nonce": "0x37bf43e0ce953834e0fe4e002637be60d05c1e1ca3af91cadfd7da765004d1a4",
    "signature": "0xfb91594e24dd6ed925213e54a1dab7b04e82051d3e3879178b136d92d9078eec7d4dfdd8a4281825b54783e6e9fb51160680f73d1d57cf0fa912a22c985ad4e91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}