{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa311f96d6897cef5b43cbccc9e9670eef73647625eafbfc5d0fa80d45941ae10",
    "signature": "0x15e191c0189a9bf5fc7485099ceac32904a85f4a84077432f05b9ed050960b34215c1c80a62c7cdb60c69d7168a998ebac0b2bb6efee5afe6f59be95fe4773ed1c",
    "signer": "0x90336978123880996d16F1b2ECF206DFf96D3e72",
    "userId": "505271212"
  }
}