{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x496ea2ff5f77000ba7a435f2ececa0b8d08f4024b126d48017c7ab2a48222c9f",
    "signature": "0xb04c09bc1a3bf25dadcc5e92f075d2f815e3ac476f03b334384e141e5fd0320e7891f14225c8c7b3d1ec0564660ff5e0803cac56a0829c4e5aed9da599bc413e1c",
    "signer": "0x8fcC513d42A092067e33501CAC6C1d8D6aDE3B17",
    "userId": "375661770"
  }
}