{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x454c512682cbedd280e8bf81633cb8bedae0efe2f4aa86aeec2fa4199a56590e",
    "signature": "0x1f973b1cec9d8209eea528ff7b9ff42234c8b9b02034a759df21fac5daa81a86101954b5ff313415f5479c761fdbf196506b22c18b412f1764c72a15fe0354eb1c",
    "signer": "0xC4e7DcD6A5AC88f4E86b3459Bf65129acBdd3794",
    "userId": "108256647"
  }
}