{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "145872789",
    "entityType": "User",
    "nonce": "0x461bf23a024ddd9a963cf1ecbbbdb1137991eb755dd741d5984f877342046337",
    "signature": "0xada863f46ffb526bc63aff86feccbb1c82ecd8715302ab553c4cf8e100c8d8a55db347d3f3e125bbf4e2c7bd85579a1870fb80fbcd5a1daeb9fd818f231c0c8a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}