{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1921",
    "entityType": "User",
    "nonce": "0x23d721a282aa166adf4ebad8ccbe8b118d5cf2cb0de74cedceb6eac7b9a15e5d",
    "signature": "0x3e8e41ac02abd69e27a3cbeb6afc42a7af62e7cbaa02bbb2e4600f9b668d347204f453690376dbe0990852ae69cd888d26d658400a24c75d390b9e4258a9230c1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}