{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "610823165",
    "entityType": "User",
    "nonce": "0x9b5967d05623edad4bdba7a0447f7fa920ab9c0037a5871ca1eab4b4ae16bc2c",
    "signature": "0x667f67b51c3afd78c65a47ecf6ec3576b231715e42e9670d12bb0d8729f8ed954326a500702ff5a0cfa967f2ac498b00257ad2676a4a2e85511335d82cadce551b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}