{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "881446128",
    "entityType": "User",
    "nonce": "0xd7ab46fba80c9a6f6c27c8af4833faaf0048e1cca6d63922343eed2a4b53d141",
    "signature": "0xdf9ae8c1a32d003a8f40bfaf6d116e1eef0caa943f2e920c8c7832766b992df00619735efd34c4fc58ce3c88129c6010545b404835d9cec77a635571d26d6a131b",
    "signer": "0x721f076D6fdC57634d612324093cA69B47866867",
    "userId": "303348966"
  }
}