{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "641301",
    "entityType": "User",
    "nonce": "0xb00c69a2a0fff425b629fff0de32b164dbf4aa6ff88855e79d0379dc3fe1558e",
    "signature": "0xc9a5d5d63aa281b5895a1ad65cee9bc01c64577e6f7b42a12d052de371f8186174492c033165312bec7c45a47fa3d42a772fda47f93875717486514eb4c45ac51c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}