{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512820",
    "entityType": "User",
    "nonce": "0x819efc6b5b442aefc1171aa18ea21331f1f0f8895e62a7916dce3f31f76388a9",
    "signature": "0x37c58a783c43e4c7e04dac3fa7c7cbd564cb6496572c2406f4b09e1ff8a25da57e03df50ade25e53eff8b933f5ad04ea7b8476c6f98b779f2bb5913f652e925b1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}