{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7899587144773e98516b94b99b880d0c19e1710eef790b419911c3bcaa3a14ad",
    "signature": "0x17fef573c467fc3a51d69b0a5a6bb05619dc246156743d5e5e2a7b557ffed09f471b81fb0d897bf7f5ea29ddb6524a8626bdff42b6ab1fc024295931ab96ec451b",
    "signer": "0x61674481B2Fe9c307a8079B1db6a75d18CcE4e72",
    "userId": "550945137"
  }
}