{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50198",
    "entityType": "User",
    "nonce": "0xd4caefdf997b21c2602f4d7dc984ba9fc0b96c373c4908887bd51f2ea4e65642",
    "signature": "0x60189ccaacb7bfdd11b3fa4954ba5b610e1a89fee2b9d2656743b77891a488b943a35a27a7ae79a171c4750fcbdd154a4ee043dc9831335d6fa62f3507f90c601c",
    "signer": "0xC90e14007305577f04e5F4f5542B2191bB2c7394",
    "userId": "1856608"
  }
}