{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0xe156d83b48e222311aecdb2ac710c309f4fbe3a0335a827492aa0a4aa7045476",
    "signature": "0xa13d401b0779a7ad79aad3c34dedada93aa01ab2ba1994572abd4c7bdd4ada735030c87a08f3fe2242d869b5144f84e57f5ecf504c5f1b0f7970680a1e3913cf1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}