{
  "manageEntity": {
    "action": "Save",
    "entityId": "1510447869",
    "entityType": "Track",
    "nonce": "0xfce8404ff6bed189ac6b6408f2d89ea4a2f7a57ba9efc5869fbe7a915ef2cd34",
    "signature": "0x425ebc670075d19d35eb2b1048dbc1f948fa52e1468c96e35a238a779c2d18310629ca685867562cd9e408888d617e25b56a3551ebd9d6dc1c9c85346722e1751b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}