{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2521",
    "entityType": "User",
    "nonce": "0xb8d09f55329f6f98870c8674aef1887061b82d82b086926e31e0ac7dea443d23",
    "signature": "0xc055515bbab3649ce293f28787f3dc7e89e84738736d8bca36b519d364c3d3b200d57f4242b9d935c13f3d87593c61cda11a6fe786905862b5c5aeae2bf400cf1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}