{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x30c4bad700f12acb1fea4c45baf044822fcebd5bd016ed87263ab38d8ac68a3d",
    "signature": "0xd201fac1c04cbbe50bc925acaeb2cf08493bff7eaaff80b181cd7d3df17664855d318c2253952abf5fefb0ef45203c88cb6827ef0fccde6ff48b8fbe0862d3c61b",
    "signer": "0x55Ce1d9da361CDBCB1EE0bAe0ACf5c5B56A55C0D",
    "userId": "533437320"
  }
}