{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "709700989",
    "entityType": "User",
    "nonce": "0x509752b22b77bec33aecf99444b081da7d0a16b8841dc63e87ba91dbbf80dd51",
    "signature": "0xd5a10c1499afb13a03d312988be3f7399ef9c0183240b13050d7a6254308827c713cc9e2f2ffc751e836d54102b734fe679ab98c86854e24b4b559f46889136f1b",
    "signer": "0xecd9816D879645e9327091231b4e7031332f233a",
    "userId": "579649923"
  }
}