{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "553023467",
    "entityType": "User",
    "nonce": "0x2f9b3168bbafc5b92bcd80b49fac6bb217145af41e50f9f23e9681c559049941",
    "signature": "0x3c5dd11923b2b3c4c69a6bc54cbc7e6556c0f9cd16bd14f5aa9406e6f7b8c97b649ce50eafaccd1b182be11a91e608bc983ebe995bdd64af3f9c6e54249b0f0c1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}