{
  "manageEntity": {
    "action": "Save",
    "entityId": "1328827878",
    "entityType": "Track",
    "nonce": "1786492355616746168",
    "signature": "0x9c355ae3790be3272c79c55e874c22630376add49b9bd38944ce9d6c47a7bf7717e807c659647ee0478de590476c7754ec6fa1283e2ec2c678d3d76a16c14f7e1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}