{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1b84df77f3e3dd8719a4c2a52af34aa7b6f1b14f53181ff2d718528f1e39a23b",
    "signature": "0x4a2a50ed557d822523949694e92412708744ded329d8c1f0d111182bcafbc9ea176226f6ecf38c93ce10a337593a5dc3bc8432ba79e756848d2019e299dfb57c1b",
    "signer": "0x328D1E69b7920419F3bb7e5B45BbDCA1016Ec0b6",
    "userId": "645293242"
  }
}