{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc0b5d548c931021add52b065a8b38a55f94926bd16a9e3a4b7d7526020b9b555",
    "signature": "0x9f9bf9262c79fcbc4938e1db1393bc902bef7175d493bd88bd3e466835614fce4bd35ee62a95ced6c137144dfb2f780d023b7304e23a5738ea42ce69306135c01b",
    "signer": "0x21a5710f36Fc5185Fc03Cd702E75569FB6F3eEdC",
    "userId": "33689810"
  }
}