{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x903d5cfc54833556c6b170d97b5d86a9ad8177fa899a41560acd2a0f26436840",
    "signature": "0x16e8a7f917ad1ba7effdb0b73142e77013df6eb3c713e15d4e31902a65ee74860862f3e60b70debaa1f70b5129cf3b33a61616cf834a1a49ee496a9b2ce5f3c11c",
    "signer": "0xFfEDC8a6177467Dd818D12079De6E66E514EeA03",
    "userId": "992110484"
  }
}