{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54120",
    "entityType": "User",
    "nonce": "0x9c5d81c5ccb4a5499d04fe5df9c6bec2a5526d28b462464f02521406d9c685a1",
    "signature": "0xfffaf4c6acc345258cdb7498096a42d0c83fcfbcc1b3ec912a6a3acb539e78815114f6c979471b3f40a52f69a6515dce7246f5e947653aed1367f20dd2dc0ebc1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}