{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "398755753",
    "entityType": "User",
    "nonce": "0x3b03fae74a1acef516ac96f190eb61104a8877b22bee90b7c0a4639e6af0af0d",
    "signature": "0x15c79fd5a3a165886846069e2546ef1f6d119ce970a3398b47688255fd3bcc5e577057f8d02c84d22d862aa58bc47b3b98207d21cb01c14501a8aaf04173333e1b",
    "signer": "0x66897996b38D5FBFfa383eD077e429C63B8AD506",
    "userId": "904230991"
  }
}