{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x4a40207a1322785266dbff6b64d802b7270255d5a10b182a22023d94fad0ecda",
    "signature": "0xb53d1fc917545dd8e6845fceff91c7ace7c5c0a0ce3943963accee7d2638de6b68cac041dd4200e90a7aee142e79a5362d1fe97c2cf261fa23f802e129e4f16f1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}