{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa3c843a47bf67b45f0b32b15cbf930a273d5d1a9ef343876367726e101b1a81f",
    "signature": "0xfe11ec9973f556fa409be745f95063b5f864a183fc5f800b9cf31140a52c88c93ba36585ffc3d2414d80c15ad2ba098d65ab24ef40fa99f85afcdaac52d06aea1b",
    "signer": "0x548E1c3e772F1853e347739D56c373D3E0E4A50d",
    "userId": "508662104"
  }
}