{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900057687",
    "entityType": "User",
    "nonce": "0x9847e369c9dfe667771aa68c24fbffee6cfddc6dfcaf3f6ce7de5c36518e1738",
    "signature": "0x6b77f58c98b943343c4ff9bdc95e9ea90afa9d88c59d00f283145dee2dfe23c5435213c320bc1904cb8240a9ea061d955d731a94af7400f056c81762aa7383ee1c",
    "signer": "0x3256Bd2D0B1984E7df4FA525017aD9bA48470760",
    "userId": "51"
  }
}