{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x584758ff4cb128cb09cd1af5d5579019fea36c25e88452a2d1bb499128a79ae5",
    "signature": "0xaa39cfc1378f82d2ecd1a89e4fd33be66dbd222cc7ef775b4160c57aed4450b20a0c2a9c1cb9d5d162d53ea79f303843d834b1829eb272713695d65c0a6127ea1c",
    "signer": "0x54843d003DCBeEC3EAA58af1cD2BFaf52E4d065e",
    "userId": "106509815"
  }
}