{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203033459",
    "entityType": "Track",
    "nonce": "0x14f7967c7bdfe88faf528bab58776be8315d515b143ab442dd96fe2149d9f826",
    "signature": "0x89a83d0bc5541f2dcf8b3ca99acaa3f3a9ee8cd18bff4ab7e2e043b416c04d5d0d4f44e919dd0c977903d034b688c0d0dd6dc355d936abc8727a18de2f99d9341c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}