{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "520958130",
    "entityType": "User",
    "nonce": "0x3cd17378ce6915a0d427597f65534640ab0265d52337e3a658c33d93a8157138",
    "signature": "0xf7f2d3ac7949509aa8f65a2537fb0f0b3d7da0e2b734278d5b02e5e48afec87c349b2eb7eafcda36109e52ea429c38aa0d3b040037ffe06de2462a9e924bf9171c",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}