{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x845119a77029d5af5504115ceaa3e4625e64b790a0d820e3f3b5bacc70012940",
    "signature": "0xac139bae38c1557748b55d784f09f0f61875f53d94698be52f3e57f102ededdf65a4f17cc59ace1a2325ffba21871362790ad5cb5a1c3952eb6347cffadccd501c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}