{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9ca5252f33e30f4afb1eb8b6f6e8e3a0861fa76c8336e227ed1ac11040b96b29",
    "signature": "0x3a765a14eb8923bf8657bf9e13bb9d8cdbd1b215385bbeeef34b6d19e38c761259c79c55492d8454eb6424c352b355fc935b13b7abbd116c07459c30885e5d441b",
    "signer": "0x67801FC7F7b4643FF9A2072b86D99e63A0bb2CfB",
    "userId": "556059564"
  }
}