{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "629576660",
    "entityType": "User",
    "nonce": "0x90ce365aa458b6288048f404342ceea085a34f757872aa9ea0ff93de94b7578c",
    "signature": "0x3ac36c3ecbb5f9a743e74f7d3b8ee2bd578a4e64f28db93a48fb4ef4656929ad40017221a4b931e373517d246a8f19bb00cf7bffb5e90bffb8d6f84eb7396d1e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}