{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352230097",
    "entityType": "Track",
    "nonce": "0x52eaa712f120e5d792a2a5b7ace32ca02332d7b6b9566fe8f616368d22b31c2f",
    "signature": "0x04fefbc87cf47272931bfb78f4095295e4cf397653e41819bea0174815b1ee34301733ed3ccdccc9bb3685afce9294fc3d08a4fc9b6c67d2ef1a0e582963aacf1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}