{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "431509",
    "entityType": "User",
    "nonce": "0xdf77fd71eaac06abb0aab602f20e01cf2e76ff08bdbc3e9fb83f5f6a6b81c421",
    "signature": "0x14c11944a741aa9bcd6ea0a58cbed16a7d8453293ecc5569144f5acdd4e401377fa5805d4499ae5cff7359f496539679d5a5a7f61e09d57c449d0db0b435ccdb1b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}