{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "73158",
    "entityType": "User",
    "nonce": "0x9c0fd2b4d07eb64d522223cb36a7b11ce8ec8eb9fea4b0a4bdada7440b800d45",
    "signature": "0xc04ccdc2172b6d066c0e8cf6cd11b41f8817f67390e54418be8643877d9eea9162c6b3ab018199385e3edadccf3c6d39489fc77507aee23a6f98bab17a60379d1c",
    "signer": "0x21a7A27cB4B4662C0210B787b56aED1436642E2E",
    "userId": "645523947"
  }
}