{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xda21ac8487acf7f43c13bb002abfeaea63d13aa27c2fca7968c3e697f59df679",
    "signature": "0x224c16cd5b4cbaed1428e2f0be2b32e385cee38ce3407b8aa23c98ba16ba65fc5a141761640d41ce877ea02bf715677d5e4843ee835b548afd40fd36cd53308c1c",
    "signer": "0x54847cD30cEc1B837DE67e24799c02C0D554FFaD",
    "userId": "201322657"
  }
}