{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "125412",
    "entityType": "User",
    "nonce": "0x258cb1eeb52f7d7db0fb54c5e68d061ec5756ed4c20ed62f5039e971c13a184e",
    "signature": "0xcde0588f71ff43027b1abacf73575a2ad7a2f6a02d7f9a6f556da32b4b844368319aa9c6529b733d45926d3ae44a1294346a3a864efcfd918564d11117c5042a1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}