{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763473",
    "entityType": "User",
    "nonce": "0x01d58fb6d23342bc794c90fcadb2ae4bed0a8eb094cb579a69223ac73cc4d121",
    "signature": "0x53083393b2c7e7643d02bc01be6592d4b9f8a18757c8bfee8c0dd21b3158ea4866e7308c3e1c925bfa529258757c172f24819e4814362e9a2b83f319c49b5cef1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}