{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699162708",
    "entityType": "Track",
    "nonce": "0xe00a43cef8ed9fb6b8a8dfaa588278d58af6f4f6f247601175cdbb0e83aebbb9",
    "signature": "0xc8cdd7d427c7e6c76dbb743cac77119bf2ed7765b8d55845f34e523a5309c2777c2f3e3973426ecaa67af929c4ff5cf676642833b1ed92aa44eb1521614413c01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}