{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbdf9fd2ecc39570873bb98dca391e37f3d0b2a647865ccd8e0820bdf59c9220a",
    "signature": "0x5fee1d0f9c758ec2fb67685d5c92206a4e0c248742e23f8b8503cee23db8f8363e97c1e9d805fe9fade46b94ce110c0c6548c2561aba43b8b21e4a23cc28f5581c",
    "signer": "0x74fbDf9CC0828977855E95524bCf5982d148827A",
    "userId": "579570300"
  }
}