{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "857792049",
    "entityType": "User",
    "nonce": "0x5344b6accc1fbd60559103a092c24152400a62a7908dd1022a5b2311e00f6e95",
    "signature": "0x7f0f7606feb7b96cd2369550ff7e2b7b009e5ef5426e5a1eac351a9ebca0e52d02ca1b6c1a9d6aecc2aff78a2713bf6edbbb8fddf379698b4813fcbd5ea94fac1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}