{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "721570434",
    "entityType": "User",
    "nonce": "0xffafd677253ddd8f1137912b74f204e99c955a0bdea77866a18769e0f71fc388",
    "signature": "0xd29271cbcd6bdefd4505060b1da7b29b2d45b7e8d37b23c0d5dd25eaa370c93511e75681717033efa2830ddec6091af49b25550a51d9a68819cac1b31d25952d1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}