{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "600556383",
    "entityType": "User",
    "nonce": "0x502b462d50921c02e104b7357f9a873664fbe23f6931a435edfeaa536562557b",
    "signature": "0x37d037023cca4999d2b194e253a5db25aac17e5199f976f12b36bee7937d9d896ff0079b3d8143c8b40e4a0b949bd160c5a3d5ce3e876cdd21d22d56069b336f1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}