{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "575846432",
    "entityType": "User",
    "nonce": "0x9816239ca21dd66f3e72d5ced0ffca042cc9fd279402c442fac8dfb0bd1fb9a8",
    "signature": "0x717dfdcc39a2ebb732931e94b4a81cec1a62f1320ec8ac7170b98e9349ef44b23cb8861e90d2eae660e07e4c59da753b48c021e8d07941fdbeeac0180a5165331c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}