{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343301",
    "entityType": "User",
    "nonce": "0x6b5621c0e03a3d619ec0a8e76ac0c05296d31938963b57b577074d669a75f5bd",
    "signature": "0x0415bb59ced490066b56addbd5cfca5e0e144ddd1d83294123c7201d27888c727693e8c4f0e163c5506ce01e29414639daa69e10b76097674e66677f989822b21c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}