{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51616847",
    "entityType": "User",
    "nonce": "0x51a0540f4c4046b36b5ebae0770955ed159275f8051c03d655c29c5b69958be9",
    "signature": "0xc6e2b6de78c90d033aef8d4da9b2197ab4dcbf482681a7039516a7e165169b7e4456eb424f7dd4221cd018ce83eabd3395201253e0811e4e75f32dee2209090a1b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}