{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "688901909",
    "entityType": "User",
    "nonce": "0x1ab61df274a4ff2a8fbbac7a162f6ad45fd85705f9f86f4501b0459352cce538",
    "signature": "0x6523af1ec42443ca278ba1b023f89f780f7ee417ccdad512017ef837b09f97ac3b0fa370da35911e643c5aac6d2cf9e7bac4f19ef0286ac851ad36c8bb080f961b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}