{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421",
    "entityType": "User",
    "nonce": "0x746a1a5e831bc9217795e829ce52ac1219671ec85c792888bcd195741059334e",
    "signature": "0x2ddc40d358f709ce196f1b1185c6e97a4adf478c89c03d506f5d94283bd40cfa43f6120018eace9f3abaa1dea59101e17f9013f6d336fc30db31360022b68e041c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}