{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1d1ed49ede3a122dcb22d7c587b408b071cec87765700f9fd35dbfae54812a12",
    "signature": "0x4f1d9bdbba5f75eaad42ec3007747d3b2ded55081457a8146b51da7239537efb515ed6f4a81af00905bc5930afd159a6166e7a7b98f4a2e19e52d8ea43853d7f1b",
    "signer": "0x21529354907e07BD5376201F2ad6e4089Cdda9F5",
    "userId": "16526399"
  }
}