{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "219968466",
    "entityType": "User",
    "nonce": "0x15f7eb9dd4fe178975632579088b4ba960e1a666dcc458abd7a1bcbcb5263df0",
    "signature": "0x540aa2bbd0dd4c7d7c380fa7f0b841d62db383f8cfc042acf2f9cfa1a6f351014d02392df0db808b10277ee6d35d3ca633576eaa9b9b2e26562f512bc8e43bc41b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}