{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18103630",
    "entityType": "User",
    "nonce": "0x38421eecf4756db253163369f03133ab937f1ce12ba8ad8e09bab9448a11df87",
    "signature": "0x2ae5238bdcb11becac6d8c6de4e77d675e5f0a71a426c731ea016ec1c1e3b3353c1f8837fdc5dcc43bbe052b5075939d5dc89216cdda29c84c3b478e2a0be94f1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}