{
  "manageEntity": {
    "action": "Save",
    "entityId": "74173689",
    "entityType": "Track",
    "nonce": "0xa08be94cf694124d443aa253da1f0e99c5af7c3ab76c31842ed8ba2f3beb51ce",
    "signature": "0xd40100067b4122b8b0741edf80f10552eef9d2c07801319e2cbd414558c43559038182d69a395a11bf0e791fd885cc32ff83141d971121b72e2210842f98334a1b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}