{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "215830",
    "entityType": "User",
    "nonce": "0x51f8d5d9cef1416f7b1fc29ac1cd6b8c97244b110b809118c1e750128d4a2077",
    "signature": "0x7a27ee2a50675be6376d65e9f2043c1f5acc63af05b31e2acf5d692b091e35315ead9a56f4791d5b842cff6388dc176d1ca5e37c2b15966cbfcfb4c1a82510451b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}