{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbdc9f3efe9432b3992b832258e8442f3fcbb8cb045989e16f800d05a9a8d3791",
    "signature": "0x1863a0cc633b9b7940fa04f1c5dee8a667c18853d576191df50ee6350573aacc72e76e7c89535b5a4b2ac10437330865450c61bbda0561ca3244d5cae6001fe81c",
    "signer": "0x45E821Cffe44AC8A2Ba48dccbE6E3054922188d1",
    "userId": "400101313"
  }
}