{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe3209458929e56e3afabe800851083e0bc18ad8de17123dd3c8191fda00262a3",
    "signature": "0xada0b2c4043c241e76dd0f5665154b9b4155bd3ae9a9468d86124503d46fecf52584b7e31f482ddee727d549daaf7bbe7cc5a9a3fd91e4c5bb962d99437bc4c61b",
    "signer": "0xc4171163317349E551651B3d39a6B438C0ab38F2",
    "userId": "112211347"
  }
}