{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "818768289",
    "entityType": "User",
    "nonce": "0x736f169834574122e4c0304b881128f260169e50dba37236b46f8d137c643f8e",
    "signature": "0x042140f101f099300841edc75d08a2c67ee242a91c164c653a7f7ecb35d928d22728313069202e32910c3507d382c94da370f91385d4d617e1b3943810248e831b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}