{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "609847193",
    "entityType": "User",
    "nonce": "0x8104b20e54f8d557a91b79fbc236508472c331c05840d32f98494118a8d41b54",
    "signature": "0x0552174cd5d0caa70636021f1215d11aa079ff37f0f0b672c8e054011127bcac42dafd71e0ddf86807b4b69d16b599da4ba2fb62de2b1ca8daadf39d87850be91c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}