{
  "manageEntity": {
    "action": "Save",
    "entityId": "1729152797",
    "entityType": "Track",
    "nonce": "0xed9ff5e1e5c5b3289588f2d561a6d50fdfea16ebb4466fd829bc948f51f570d1",
    "signature": "0x5d239bcf9d5ae9fcf1487748d96e4317cc72887024555b0f22cc438574751b257ff918cc8d78c14b7a5355cc89e437292df6d190f87dd6bb37f0edf05cf1b8e81c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}