{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbf2c0d35090b0fd53dd602e3bdff10ba988133e31e3b41224f6b24c9d87e5410",
    "signature": "0x1928c2bf8ff8719b76aa3da1aa7c13c8e897a56d2b32ca991c9365dd3f54b18f14b271b37d6981fed6f3c8ac221bfa863ee8a871ec28b746d34d1fd1fbe3c02f1c",
    "signer": "0x0AB9D08AaaB5a390760Dc12953A18909cb1DC93e",
    "userId": "664855023"
  }
}