{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc7c444f11ce593efe36e85d2bb43d1953a6fa0218a3ecd8bd97e55d3e4515c48",
    "signature": "0x7be4039033a9d78821032238fc43b8285506c67a286009dac2f6f5e3f7eacaaa42b7f31f5707bc30f7d29fb4d67990d4b3a6d27b1bb98fa7b01bd7668d68abc31b",
    "signer": "0x065d3b37A2163EEd1Baf817F23C541eE19409F7E",
    "userId": "56423685"
  }
}