{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645523947",
    "entityType": "User",
    "nonce": "0x794d2c3b325be6d0c93ddd998288e71f6d24f4babf8282f03bbef43d37148e3b",
    "signature": "0x9d91217d7da6d87a65ed6ca4d6e6d879f86b32b26e569fa589062ad9c2d854dc52c66bf1ae7d27f86fa648b88b7f0f3f253a19d9e70a95f283fc5a68612003db1b",
    "signer": "0x8FfE4D68AfdF34240202742331b49cb462b7e26C",
    "userId": "660197861"
  }
}