{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7bdc6ee24f2b57839d9cf626e172a759eb4e597ecd444027dbcabb799077a068",
    "signature": "0x4bb038e0af2f911c11348aa9891a9be8e75e36e0e13f753a05e87ea25005dd9649107706cdad3705dabec56245864e242e80dbbae9fe8b1cc61aa1830a9366341b",
    "signer": "0x6951ffCe99C9ABe8d4a888f6c044C2dEBF53B8e1",
    "userId": "678975460"
  }
}