{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcc4572617e54174ad5a3d2874689bff1529d912738bfaa374c0027667cde1349",
    "signature": "0x854ca822af6eeac1e1b5bdf4a27730c168a6791378907d7e5ad5f183865925dd44cab6c236cbeb2006505bdab0c0ff838db16dd39dc5455ffe67e4878f6628271b",
    "signer": "0x3AC39444dfEE98e589f9cc7Ee2Aa6bB6BE43285F",
    "userId": "600620777"
  }
}