{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345491183",
    "entityType": "User",
    "nonce": "0x4c55a8e81abb7d993917f6b27e5ff2ae85e29a1182a994eb850aa0b0e48a0bfc",
    "signature": "0x9f9e1c36fa8d7342be45f6b32189686e7fc44d5846dd99bed9df44000cd3c70e403f1028bd517a901f467105ed734a1a81296681cd6dbeadbb1a90e0d33989971c",
    "signer": "0xE5B01ffC0f6C8237F3F8e55b3c67A263E1f9a4f5",
    "userId": "498611290"
  }
}