{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340717612",
    "entityType": "User",
    "nonce": "0x438ea9b5ebd538fb3a96468228f8f2267637938a7b16bf88abd4cdbfd71c4af4",
    "signature": "0xc1942b92aa0baabbf865b1564e50ec5f8fb8ae7ca7fbdc5c2333480fd8ece8dc6c29ca1a35626290a256349bb940487380444b2bda644b66ad3aa263feaca6891b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}