{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "475900419",
    "entityType": "User",
    "nonce": "0x52375f1b3b62eb7d4213a45a0881efcbf211649ff6c4f86547f9e14a0b30fa60",
    "signature": "0xe3c4dd1bdf6b79d891c3833cd2842b68dc8b83930d468ad77abdd9410e8b6c1d55844721657c4e94e568e4399b31dfe6c6925f8ccf9c792f474e6354c72c16fd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}