{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x73b19a779ac0c36c26691c2218326e478d382632edbf15298ec82a6bb03cfe36",
    "signature": "0x9c44226fc2fb5abe02c2581d4e45e909c70c4b15738ba76d76db16f52ef75edb3c061cca8052643512838e7c31ff352100b570ae3346597a02d603f15a2820021c",
    "signer": "0x8c5473b865B82a2EbAb23745ffe03CA73600768f",
    "userId": "561254107"
  }
}