{
  "manageEntity": {
    "action": "Save",
    "entityId": "225492",
    "entityType": "Track",
    "nonce": "0x4ad125d1ced94c3f62be122a07ebff0a70e724e92a6c51cb68c774fa263dfd0e",
    "signature": "0x3f55de71db0654e8e87fda98add9e6ddb4c80d9663b8af7d0ac6a0affefe96b93328af71b86ea663605f8724a4485d3e77c9d4b90604f7e4a4c8b42c04045c601c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}