{
  "manageEntity": {
    "action": "Save",
    "entityId": "1291352479",
    "entityType": "Track",
    "nonce": "0x3b0bbac95a580659c6a9f46c1d88f21e44afd1080faf8cf093ad416871516619",
    "signature": "0x6a6d1175d66c69c9d5f80eff1ac2b4536fa0ea6bf490e4608aa49c084d6e5aee303fc1793fe2b53da949959a67369b8d0d7214c227fe87ffcf1ff8bbb2085d171b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}