{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0xc43d7cbeffb13dfff8515446dcbcf4cf77de080d6d813dc03ec8bdc202ce4fe0",
    "signature": "0x40905010d618d5e4357f84b39514dadb75c8bddf6581ee05764bc2cd5407635e6ff156c1b5a03e9516b4bc7a55292f2b63e1536f030a3a42297006cb3e3d900a1c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}