{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "599112855",
    "entityType": "User",
    "nonce": "0x968310fe818480d8a2b4aab241f8198b8ed4f8c8ff97f3a1967b6c4651c29273",
    "signature": "0x06e4603118123ca520a42a79c2b73f4a1ff9441df78d3826dcba5d2bf40d9ebd2f29ab1e127c8785bb57051d9ea597e2474895d585324f05d7530e60e0a60f091c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}