{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "543686915",
    "entityType": "User",
    "nonce": "0xe1d01ed0326156400449811826f309ea963e2e0d97dc4144a2982f6e4e516845",
    "signature": "0xc32dd91774e4460f06bf2240b85c64b33157207b7dc8d1e2535c41ef1290ff9f1e4547ea0822e3111606e91ee46624d7dc43aee90c9f6ae6731f4ce85569e2871b",
    "signer": "0xA2431a8293fD33C6289244D08A91489fF2C9f18A",
    "userId": "325308787"
  }
}