{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x0ef70289c4ba7a7e1f8c441946e5dfaabba4302ef7ec0dcd5a9e66684af85839",
    "signature": "0x59312078c61bcca1902ea3bceff581ecfa737e22a31ee94b45da55dd26db3c975ca7c9384885110bf88d2325b22b63587ff6978f8a0eb95e3bb78b3d02a3bc871c",
    "signer": "0xc903Dc0f07bdD225292556170C57c22eD0C2b453",
    "userId": "142317"
  }
}