{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678556080",
    "entityType": "User",
    "nonce": "0x9acda2ab91ff999352b109e719fa09b42a571d984426de6c037b75443be9a508",
    "signature": "0xd85151c5784ab6321028cfdccf4df5756b501d80087884c637695bcf8895d2590cc5ff23c32b6be32c4bee3fbaff486493c43da1adfd9518fe80d63bddbe535f1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}