{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123373",
    "entityType": "User",
    "nonce": "0xa0311af3db592c5990cbe98cda942840026ebe743818e463877f6360769808d4",
    "signature": "0xbf7074af16589ab2445b940005a320bb8c4595257438c4ac246c353d782ffe256b82f004e6147b3090475347fdf9c47508321249428b7a4118320c10eb014f741b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}