{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273387437",
    "entityType": "User",
    "nonce": "0x3297973ea4835b830773ac76db7c2d062a48fca23afd5db5f6bb4d7e048fcd80",
    "signature": "0xb5c88c5497417967bf80aaf5b90e206f0d62d8397518c75c0b100a52d0142c9d030ee00d56f4992297ad4af01d5713d0b5fa07dec75f50f2dec60a26acfa34321b",
    "signer": "0xC90e14007305577f04e5F4f5542B2191bB2c7394",
    "userId": "1856608"
  }
}