{
  "manageEntity": {
    "action": "Save",
    "entityId": "350797645",
    "entityType": "Track",
    "nonce": "0x335817e3d7221929f96fd9eaf8667bf5d33e8f47123aba30d9c8eba974a43d17",
    "signature": "0xbace64dc04377e26b7eb033d8e149d3380c4d0b681d07554f56f9f1291af9dea6c721fc920ab7abac638776f73eec17b95c5f5fda35a27d277aa4162d33722d51b",
    "signer": "0x1080460F21DCc82D7160d2C77DaAb22a92c4dD22",
    "userId": "162106877"
  }
}