{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638007",
    "entityType": "User",
    "nonce": "0x7f13025ba0c1258fb8880b23a6885def517645c25a5416f32429659b04ac16b6",
    "signature": "0x6196062a07905928f5fccee29b2a5dd888ee0b7e2c3d3cd3597c84f0149a3d0a30403e9da4154ce81eb5187186587a7ef11264dbce7299d178a443d9603b13df1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}