{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250644811",
    "entityType": "Track",
    "nonce": "0xc8ae33985623b2af92b5893f764276f207a60e87e88531c08971c339561e9ebe",
    "signature": "0xac2d42a0c9185dd487a03657505204d522f4676b30f7fa183eb2a7c8bb4e3bf843aea880b034a03311cf996b3de0b7e3f308aa8b7c700b10226ef12cc5d35f751c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}