{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778523",
    "entityType": "User",
    "nonce": "0x41713cae20f7379768a7c8894e2607c4aaa187d3d3469a0ed34d08ed85ebebd8",
    "signature": "0xe250e40305983477a163f5a07c851eb92cdd064dfca40edd097fd16091dccd7c3e9659c526ad6570fa5ba8d00baa3ea2218716d979bf23a1d48bd7a2bbdcd47a1c",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}