{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1623004",
    "entityType": "User",
    "nonce": "0x16e1fd0180791f7e73088c573b263a7309aa679ed61885d2408581992baa1124",
    "signature": "0x49214b54b49d7f45ff5d92b6f4e175b4556456d4db77d17eca0f05fd0877ffaf62cca484e6d6fddef4a2112271d74992aacfedaa509bff58404ead2e04df3df51b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}