{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0xc2cc7b417c7b4710b0b1515fdc94037dbd9fdb6a313c7fdd41d2d06548240060",
    "signature": "0x3b8c54532c04f94479386773bda330b717fb507da59d2c90afd48800a1f816f73d99e9497cbb907a297d0f6861561d6e90ac2ac0eccbd72c0de37066a6fdaf451b",
    "signer": "0xA7D206a8f2b63986B1Af437a01CFbCDCcE69601e",
    "userId": "856769027"
  }
}