{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x4a4f0e95783dd40c48ca1c7a831acdd3293933c02e4f96bd517f4df680979091",
    "signature": "0x26e3364e0750230b36d02b9ad9aeba230140e8bc4e6f393f38683f40036a6302520d6b4f2333377eadb3d2154065178f296c145b47e6698d797c943d38df63f01b",
    "signer": "0x675366e39d19EbC2D10f111F5A52397F7f40f625",
    "userId": "829793830"
  }
}