{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "172240066",
    "entityType": "User",
    "nonce": "0x304841e86ae50e9f5dfea3735579ccc8d9644f979cc928fb6c53fdfb47a4d40a",
    "signature": "0x68144232efb29f5411dc3c44c5fa93a4dddde9338786b0d91baf06dd4fc7002554d0b55bf60c7c4660f1d4134fb131341db09d6b9f10d7ff7c5bd199895516281c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}