{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x83d37b92c82d36eb11a5c95d93ae60d9e275a59c203fe747dbcffeb5222c30e9",
    "signature": "0x1590ffc719e049d23fe69cb59267b9f4ff47246ab6f60f9058f7e048b631bbbb68cd686da0f940d5932076ccbaee047eab29f2f429e3e4524e2725ae9bd3a99a1c",
    "signer": "0x28509abd14970e165D1f5E0018A5409Ea856C689",
    "userId": "539347142"
  }
}