{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1ca2186721fd404ef9f3d2eb980f174e7c15efaacc0d013fe0e41c36529d717e",
    "signature": "0xcdab4ff3c9556b088ad964062212a96bebfea2172cc210e67a05651965ede8cb4194d119be1e2142759c453f39d8c2b7ceea95444548c3d349c8967cf4d428971b",
    "signer": "0xa74bA38E2215807789c686E33Ade6FB632927C84",
    "userId": "881537377"
  }
}