{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "142553",
    "entityType": "User",
    "nonce": "0xf1bcc5b81b875937f8b1f3f135330d46d170f8eccd99f97b30dae4ee917c91b2",
    "signature": "0x5fe8f9bacc9c053cdb604fe46f3bceee60c35430083b276d9c600eb2c7acb6ad3ddf763c0e4c58b453f3b65070b1850cbbd2332950fabe46620fa5a45c280a581c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}