{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999692142",
    "entityType": "User",
    "nonce": "0x5db8fc059c0eebbe4dbbee0b9d803b5796fe7e0a744a411dfb46a0a794303532",
    "signature": "0x5563419ab13645a1e49cf6d83a45e25f486fbcf02da4d6ca9b15c5a1805ed7180d445187051639482d8a10f61039033aedeac6cda9c5f71a6f5a7dc3f99f1af61c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}