{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0x12919e119ee56ad1490771b1aff246dcb59fe07a5b5a6bd9de2e968cbca873b2",
    "signature": "0xc1b76affb8f0a34e5fb912d4694b47e14f50dc7a7029381a1c0ea6cd473473ca2cc4981e85cdd2cd765e5c35b56ab02374f556834b43f7a1f6ad031eff7cfcc41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}