{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0x775357e738c6b613fc9c167324af0732766b56f4397a13daeb58944ad82bcb06",
    "signature": "0xf6a0a55746d955f7d11ceeaed289eef1979fd046976ae7891b06e909c1fac3375c864528fbff926c515728058a26b9502274aa223e752938b6e025c00ef187bd1c",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}