{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "740883",
    "entityType": "User",
    "nonce": "0x41500bf2bb0727c1aa931e25fa010a879d85a01a577c38a83addf1def2a4e034",
    "signature": "0x442e9cefc9e738553e65360ffaffa9d1991be7e4e7427f5126dd647821347c1175581a71c423d4f239e0ee36fbc1774efe7ecf39be3aca185b701a8b2f7594101b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}