{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21037",
    "entityType": "User",
    "nonce": "0x1bc168bdf4f0b9fcb45b9d9d9db637d2ae9676ca1f61b1a48aeb6e8c96b9b34c",
    "signature": "0x50a4dbc119395f2d1c4f039e3a1222b26985450ab247cac97ce1294e1443f2796c32d8e9efdad54ee3c2eebfc94dff24212a0ff61b97ab879948d9dfb055f0d41c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}