{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459117502",
    "entityType": "Track",
    "nonce": "0xdf0cd6004564bfb6cd0eb61a3c87b648470cd81ad02ac7c127bbda645ac73f03",
    "signature": "0x6828767d8f1b526589b7091b9bc429a0fa59d9a0b8e6be46ed334ba46c4ee58a7c65846f0f04cf0f79f078efe24ed29465f2085d6ddf2e89c91bf433ca46ed8d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}