{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "821884490",
    "entityType": "User",
    "nonce": "0x8744a39b2d8e19e56ac364a6f16c7ec193585237441b90fb731f124221661b21",
    "signature": "0x79a5133f46ba2c8ea8a3094eb170f7c4be0fbb0de5db71241dfed9f1ea56577c45685f905fc5dc46d7103d86c63df8e4279d0bfdfaab9b89e405adfd99ebefb81b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}