{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "543439291",
    "entityType": "User",
    "nonce": "0x44e385dccc44e908f50bf38f0fe6ba418b3807e464996a29ecd6bb21cd489591",
    "signature": "0x0b7664a6dfeac684c15d7135bdea451296e2ba93fdd1ac4ea5dd83372553fe0b7dd9761044755d0e002badb7849fbb0d03cbde4ef7f33cc3db04cc92822d1b1d1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}