{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xe80376a82fff6389ac49a513fc56a1d0f5df8dd4818a1fec6ed9db9497f10f80",
    "signature": "0xe7da0fcad023959af4520ffae3b989a4cfdd25a380c56a11c9f6d57e7094c6f74ba46cf5b605d5c1441554ded8c96117944eb1e8aeaaf4835b2207c1a228fd5e1b",
    "signer": "0x406fd2b6f6C6cC5622Ac1c5799cE4911D81e02a7",
    "userId": "461949730"
  }
}