{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "313755",
    "entityType": "User",
    "nonce": "0x535501b275b272d6a6050465d8b766789e03d637dc52067063857b7fb8227e20",
    "signature": "0x3109e6aa05fdd2ac6c09b832b759562a32616db462748977a236099ba63378ec52b8f92c0b5e08dfd8b444cc16ccebec8e462251f4341ccd00f4f440a236aac51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}