{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "444908523",
    "entityType": "User",
    "nonce": "0x9ffd64cfa9bc71c347e81bf0f7c5c5ac5a656dfdff16fd5036c15757254c6c1b",
    "signature": "0x19050ba3d5b5cfe2452a84e8efa3ddfbc32e6d68900f570a8cb0c38b28c3012b446e37cec53a98553441226aca5f57854d11db742caa827ca1c64d41e5d5bad11c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}