{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7815",
    "entityType": "User",
    "nonce": "0x11072e90ee8b593091da2790172dbf7340a3ef8b0465d91080b0c0a426b79397",
    "signature": "0xd052096ea50f4a66cd13d5ef9821d2f1607f40e83198bc2f1e3164a3c8dc1f123718a8b8c59ca451d3d5ad207207a707f3038c83d9e42b5a07612ff4536e1d801c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}