{
  "manageEntity": {
    "action": "Save",
    "entityId": "1670935431",
    "entityType": "Track",
    "nonce": "0xfb677a19eb2525f89239dc58c3dee0b028a76c8471c146ff5271a3715f2bd828",
    "signature": "0xcde75b05a71e311c31927f58b737d91923bd9da467920378d288fa68541eea530ed6c7e24ecfb4c2e337689e0400dd35c464d015fcace1f8bcf058814368b9fc1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}