{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375577",
    "entityType": "User",
    "nonce": "0xe3a9ec646129e312c4d1dc5f2e079dca013dd9a811fc4498296a0139fa455297",
    "signature": "0xab1cc137bcbd305085eb3ff76a8ec98b3c421caaf77d9cede49cb57c598e671c313858a89b3b5a75b24f19504c6c6c71daf6ea4ee1c3a53543e90e0ca1f53da81c",
    "signer": "0x6Af6D40d1d0B48D79D2bd3E3c8f0a45540130c0F",
    "userId": "89433"
  }
}