{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "298654375",
    "entityType": "User",
    "nonce": "0x77edbccaaece12e4575a527931e994e58e159de694a1966ddfbe041e3f5d7f14",
    "signature": "0xc6e2e101b18b8e7fc2a26ca0c1df4cfad5e73ba3c4edb50acc611decef65240f04d10aa2ee2e0f01f812d4e03e05181bd60d9d02ce75afb8df31f601301c9c4f1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}