{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "209405413",
    "entityType": "User",
    "nonce": "0x842c0cb50d7ff2d4333ce18da4c3d86dc15ddf0d594cb21b20a38f9401730dc9",
    "signature": "0xa9aa9c5d74749995dc719bfac8bdb1852ff8aad969324ab78968ff52c0fe42dd70e88b2c5fbf2000f0b4c2f60eb8fdde07f4511e8a28840cb275e5164df4c6e21b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}