{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "100",
    "entityType": "User",
    "nonce": "0x2d5dc217e1b3beb3f0bd875edc5910f11950160e2b43114719e4ce9c7d83a64a",
    "signature": "0x40e29c513c80a70266afcbb0863c390ba8e0cdc53615e3e3a4b6db17f0e489d17ff672163918e0d97f31412ff4f31158c6a28da69e43a9252222515f829e1c8a1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}