{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "387546",
    "entityType": "User",
    "nonce": "0x51fbc11c37bd4b0bb607e4322cb2b971736be8b36ea2ffaa96444564e1754bb6",
    "signature": "0x3f0899314aa8e93b8e662af29a62ada01155ed7b0be315a2790499778d6126512acaaa537f1ce1dbb22c9d6769b9ed667e895c2ff228c5bc14938c09ce9189f11c",
    "signer": "0x15F044DF87A440bA5eEeC6D18C219f99Fe2A80b3",
    "userId": "909119422"
  }
}