{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x168e0deb2cfe954738a4cfbf6cb7721cc89d3e67e44ff431583491b00c949160",
    "signature": "0xbb2c8702f1924d09d6cc1ae4736c81198d0fca666deff3f6ecb7a256ad3b1eb1715d702665e62b5721d866523306fdf5092277f48af45bded7cd0395f994508a1b",
    "signer": "0x168ff3b3F21912D4d676468A80Ee2af0E2F24a59",
    "userId": "124431641"
  }
}