{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "489026160",
    "entityType": "User",
    "nonce": "0xed12ed941aa31ec4f81ec5ccf2afe4daf50798bc3cf78944d107bc99a3976e1b",
    "signature": "0x1a25c1d0a7c11c82d71f6be7ba370b5d322f2662f49fc448da4819c4d8eee8b159b03c68ea368c7aa693dc03f7a7d8cc427a4c9f8d0d961458b8ca8a24efb3411c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}