{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "255028509",
    "entityType": "User",
    "nonce": "0xc496c1b776a7371efeb468266d262bd21c0163c5a3cf690ee2833e3b098f03bf",
    "signature": "0xd878634e6d3d757f2a2181acbed59bf5b1a20a3f2d12e7a1c0a22d727328dfa92c6841777d99c03ce62d8ad16d2ddf9b6c1d6567c6dfaae79fd627b7f79e5a121b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}