{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8bf0b5682734eb925ecd45ca614e1b5412c763bda5fb9d1e278a831ff78a1077",
    "signature": "0xb8898e156c1227da1b594b0f899ff828bf8e426c943daacce20f8b36d43f560b32b79104e3d8f00c8837a92422ad31701853dc26ec8c4c73512b57cd97e2319b1c",
    "signer": "0xEc8A837d2ea98a496c97C5680b0E1c47bDF45306",
    "userId": "618897887"
  }
}