{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "742183721",
    "entityType": "User",
    "nonce": "0x74650011737330ce0f2b197bd660d3239ab31b5b7415834f50436a960a0b69a9",
    "signature": "0xe74014b2dd13da161edbd9f8e414824bad3c1e8d7cc39b7cbd86f16efedd15520ee4469c24c38b26967427ff9f71ac3028d37f9f5e77a8c5d3204e4d4ba341431b",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}