{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "554966848",
    "entityType": "User",
    "nonce": "0x356c093ff83e2d1bbc3c358c7a121029364c9e30b0d1170a446e514fdf40be92",
    "signature": "0x0e8acf9070ad9903e04a2f36799698c23c2cd3f0da334e5b5354c4a29af22f853d8c44ea3a24c944e869c9c06f3e2689136f360c6c994171372b0e35d3b900d61b",
    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}