{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "542918884",
    "entityType": "User",
    "nonce": "0xd217c456e2a711b0fa90de9110e2d05e3d031a1a5585878011357b7cc893aaf3",
    "signature": "0xc4c137078e2e5917c0994111b13a16aa86c524a098258ddb7aba5acdb41335cc020a328ebfcbf748de08d047c9e18658897854667ccd4d0420f139c0dc9ceca41c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}