{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1678522",
    "entityType": "User",
    "nonce": "0x1b70c7cefe96753a2ffcbcc66b0b2bb7922287cfdd28c2701ffd70e58fbe140a",
    "signature": "0x1a830909baf6825bef51290c857807d6ef3f40ca95d06b8aff297406b9aeea9a09520f0eb6950962489c10f303a081485253b55aa3ae792d2c86ad582bb8a3671c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}