{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763473",
    "entityType": "User",
    "nonce": "0x9aedecafd2a02ff20f21cf7ebd48dfbe8a39a4e2b6a824868b89116b7db9dfb4",
    "signature": "0xb1ff062be35786a08a3910b4a2712356caf2cb74d976da6f9aef7983e09e3bbb5899954c29257e4c06b8b392bdd0c81ab8f36e7c7517c7081eaeb70806de68941b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}