{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "752990",
    "entityType": "User",
    "nonce": "0x02bf482aa45557850654e31e6f3668e2255dc6c12ef610e57a1dc21c18968d5e",
    "signature": "0x3004dc2a016eae82de814f0430f62deacbd02c0988739fcc72deddb6c9e8a1fc2f873dae5df28dadc83f5aaf94e1e7ad3f580bf169bf48c1664aa38d5a116dd01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}