{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515476773",
    "entityType": "User",
    "nonce": "0xe8a3fe412ad9fe532fe191400babaf13966bb30be6fe2f8cbb27a87bbe80ffe7",
    "signature": "0x6fb8869dda15c471cb703dc1a4886f2ef6806e6ff277702a8155aef7ba3de5485eda42fb9ec1c37df6abd76d32940fda0b1dd6436c4369034797f4bc79c7aebb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}