{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf21d21f3336aefd656a3a8c1f213a2c11aba4a7b6dc723a3764e039d5b7ff1de",
    "signature": "0xed44ef8928445ea90ea2e7bda43a2090148ae5444e700ec7cdc5323a9d9de1bc0eb1cde122bbb694e83ff5419bd5a85350503b9c15bc3b6d5a245b9d9957b3e91b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}