{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0x202861b12ce6ed67d79dba533b71b0e77a6b11247e3708a6f850f426e71cb822",
    "signature": "0x8321c7d8eacb5e0404cbf793ce1602a025e18b7287f5878a481928aded4941993613d3854680bca67fb1bb63c294cc34b670e5c20134ccc3bc08933cc4a38e2d1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}