{
  "manageEntity": {
    "action": "Save",
    "entityId": "1840192448",
    "entityType": "Track",
    "nonce": "0x5c0756d95f7d9331781abb372226b2a3e9ac9d8261589b68bc66984a0527ec18",
    "signature": "0xeac46fa69706c43c2958afeeae6237177cdaaab13af89bdc46330253334f8bc404672160c2b174d1ad828e7b1185d112bce02b67a85839d43d5ef7e03a0bf0821b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}