{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1666731",
    "entityType": "User",
    "nonce": "0x7bc9286699a99215068e3e8aba39ce691c85bb73460a0cf459820378a327f31c",
    "signature": "0x6ddda6d8c28d9d697e97c3f832a9971565a4d1274d13ba951f865742c0d796ab6385b17dbd30fd2ce7c5582fc7b25a18bcf1d9a820035ed510873233e600f5cc1c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}