{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3a1f18399974970a31c9e488eaa0c7a8fd74051a2859a2e780784a9c5776b9bd",
    "signature": "0x46bbba69d1994355b0583c8809a8ef3b16961cd1c2a16b967ebd9498b6b97916167081c50aff8267834c69b5d74d85c9059b5175943cebd4bf5ac03a2578cf151c",
    "signer": "0x57B081abCE3D03a3B291fE71a5aaF1110c38e4b4",
    "userId": "623360452"
  }
}