{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb7994a7a6723b2c9a04f418a1cf5d231ff1f406444f865e5e593f46c3651e9ba",
    "signature": "0xef2820d338bd39e7a7cb8603611e1ddb63768958fa6627c65f544e964204ace075dfbf67ab90e58983545e528296b298489eba9e785fcb3aa420246c5d9e404b1c",
    "signer": "0x1aff868941743406552B545761a8C72ecF616F24",
    "userId": "476619763"
  }
}