{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "337930",
    "entityType": "User",
    "nonce": "0xb71ad43d708174d0afddfe1a1fc581607a764b242b5d772d5e4bc9d34503400d",
    "signature": "0xf939014f5f8337059885aff8386b058bc897c552f9a9f75e8ef06a58693b6a5f30391b706e8fd7c33f904c3a5a3cca22ca383558c4ac927d7a4da6154dd46aa91b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}