{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2540cc82987291c7b29d88e9ba6b789226c8e9e6daaf70f637b06bcf59391dfb",
    "signature": "0x5018489150521e34f99b8f95198e74bca4f0ea68b468853a135b27fcb01805396892284497c535a5f0f26dcd8e44f5b632bb7d5e4f04308f834b6592242ff6d41c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}