{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "57401",
    "entityType": "User",
    "nonce": "0x77cb8ba2ace3e4888288dc11635f089753019295feb2a1c95f3aabc580469cd8",
    "signature": "0xe95ffc3db4543cb5ba2e613821303f597e2a0e2a14520ee73eb574ca0c34e239438b45270347aa4a5e278a85b4d6c3ffa7f668a905ffc68231a9a1ab648543e81c",
    "signer": "0x038f9CA74f1De4A6D94d94c4C354E1F5B11fd38A",
    "userId": "453233591"
  }
}