{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xbe8760f151c95810191945823e9cc693c929511de25b4a93fbc206784c025479",
    "signature": "0xcaf9b104eea7cb072892509bac089146c9ea50f99e227fe1ece7cdaca4cc44894b83e4602832ed73580b45bc9bb4c66826ffe4444f4c25a4c556f0cdef11b2cc1b",
    "signer": "0xb947c8d74C81F96311AF654D6943a3828370fD24",
    "userId": "143893859"
  }
}