{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x1188391ea129ce36d1cf5a7bb23fc59a1859de4764778c721612a2d4362f945f",
    "signature": "0xb72678a4250831f8b4c7c51370741e37c37f0c972fd662c7cef7c501d8a4e56d6e87ac13d9a671d83dcfcbdb488e6deeecac5e5f4bd7e07a0126b5405038853a1b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}