{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303348966",
    "entityType": "User",
    "nonce": "0xda6e03c9455a70998acf5b67a997deb3d06d72682bfaba6d1ac10b2ca33c7895",
    "signature": "0xe7257856c512b22373b5bffeb6de0a05b7f7e7d2700fbfd43f82a74350bcbf1a3e52c1ea4c99fe32f36a722d880e74252d3524e219b5a1baf35bcfba943d5d7d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}