{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748896412",
    "entityType": "User",
    "nonce": "0x16c8d123c04de8c2c68d662cb10a2e5f1dbc597fac0468b68a58a574ab6609e5",
    "signature": "0xd1aa102b4870fbd5d4e9f4df434ecff061e32c5993f3a25cddc13159395c072b7ca1dd2d4b98ed4b7a7374bf9f1f9502eafdf905676fa6e93578ab4a5542f5eb1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}