{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "509662038",
    "entityType": "User",
    "nonce": "0xf47d05802b9f90f347f6bbc08bec52f7fe357fd66336ef537d900f6525eecc39",
    "signature": "0x9e5a517ef9b99d4e019efe556d00c959d7ff464c1c1d1e441fef16ecfb189b8a45c8bc329163534c4187d8525754bc19182400e755a92ab83211e8da361ef62a1c",
    "signer": "0x15F044DF87A440bA5eEeC6D18C219f99Fe2A80b3",
    "userId": "909119422"
  }
}