{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15989",
    "entityType": "User",
    "nonce": "0x7b71f7a54d16c1b6ec43f144d1f0617c87ddbe2c04b3a038c8f1917cf3203f1a",
    "signature": "0xd457b5642677ccecfcea89dec5f25016699228183668b7b7dee0a6a9b7a1481b328a5ea52fffd5dff8d23846af6721b2816e410bb3dbc841a85f6c2c809dbdec1c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}