{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "571586821",
    "entityType": "User",
    "nonce": "0x04d0f9021077f5ed0280fdf09fe3d88b73e1f01be7a2635d4b83985e1fbb20b4",
    "signature": "0xc83e999c7cdb619b3dd07fdcea2ed0135a038fc07f94d2281780d40cf1b508cb7de38c7f96c965fb2168f687dd8188bf1787105ebc473e3a73398361434656b71b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}