{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "427249190",
    "entityType": "User",
    "nonce": "0x322d011379bf5bebe73a0609e5072a23414a06856a91dd58b5f660eaf7836824",
    "signature": "0xce05cfc40f2b97638db9cb056caaf1b06ce30da5fd9cf8c81179501340a6091a0b0744cba2ef3d91fb40b7b21f0d0fdbdc8c5afbd63ff3472d1b66e1c6ac457b1b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}