{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512354652",
    "entityType": "User",
    "nonce": "0x037adc434005671aac91c4dced920ef1dd9891c0fcc7bb9700e0bbfbebae1d75",
    "signature": "0x3428b28c27b68ca108e01639e2fc97d292ee27b02cce0f5dfe02aa3899c82308447c1b2547067dd79c74c2d1d6f38750a6224ff967af7341845cc4600b872be71b",
    "signer": "0x253047c0af4Fc72D6658Bc16df0b3FE0dB459513",
    "userId": "186198383"
  }
}