{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x03d8d01d85fd048b6d5e02c9e54e156a06acd63d9c3a76b0c3fcf478ae40e453",
    "signature": "0xb5bedbec5b0abfa34af48b22c54cd451ef51f228f2f84d07e8edd542c747cb2010d3fa64e84f6ae7dae9bd736f2ac45235139d266f60a98a70f5c39d3a7d1bdb1b",
    "signer": "0x531DA5389cFf04251B433EBA2Ec726FD1d9A1E4F",
    "userId": "902513644"
  }
}