{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121215",
    "entityType": "User",
    "nonce": "0xa91a5fd9a4b0c18242e113b9e30a005733d52905207163e219921747cdfc7718",
    "signature": "0xe2029e8b121db498b22503782c095c2567ab6f6d8c8603185561e9ab59d2cda84b1e95040815d69716d5a01c85f192f7aa3d186f446d6e6dda5b52e9a3f79ac71b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}