{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x91660c9c25d17a831ffebb3caae0e451ad60c6bbb480c25792c4eef3dc3e94a0",
    "signature": "0xd95a2d412aabde0ef04070691bfaee717d04bf55b8721049ec0e4480057d72691ed9a3a1b27a96daa5231041f5b8b0046b1611e0a075adefb141e6afe3e5fb841b",
    "signer": "0x6e54F0D5BD2A9b915DFf8388cC7Bf03b9cDF7669",
    "userId": "192813938"
  }
}