{
  "manageEntity": {
    "action": "Save",
    "entityId": "565615310",
    "entityType": "Track",
    "nonce": "0xd7ece546f6fd36587de2a2b355cdf71dc234c1cdca2963d730e7e309f1b48b56",
    "signature": "0xc1fc3e7b04a10b00b7f46bbac567e6e05d345a7a5d77a09175f03a9e26159b5210340079221ef9b9627a9ab423cc2974a8af2dbe74e2fb400fa414f24d1e5d1a1c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}