{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5ae4b8663c66cb14e994b2bc7d4396c98c44660d925fe3d5d3066ce1e05b2adb",
    "signature": "0x1fbc5a908f0cdf29cdb783c6ea4c86149778412c125c49260914928b215d974f3d465ea15e0dedf07677ee5199ddb2a4dbb40fbff55cf7464f83cda23f8d50cb1c",
    "signer": "0x999a09Ee6Fc293426f0474e5729E93481D95f6ec",
    "userId": "241541029"
  }
}