{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "601",
    "entityType": "User",
    "nonce": "0x45945f2e9d1d7427f079b5a6d12ea1a70a12f5f7f0050451869f7d8e9159e504",
    "signature": "0x7a7cb2ef4e88b82ff8c975942be4ddc770a93e8152a949ebe9d6f9d08c71a45502186d0f509d4e307aa95fa73033e7fbe4d594d44a34f4151aac5423833ea9f21c",
    "signer": "0x222534475146193b99B68F2E3830ED2b44307C2D",
    "userId": "991417453"
  }
}