{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "657943233",
    "entityType": "User",
    "nonce": "0x66bf7e75e8ff6700939da9b407c58d93948685746f8da8c70bbfe4b441214d9f",
    "signature": "0x88593a187bb1f5985acf01e340aac6a418c8066bfe8a350c60a6e7949d4e7d7060249af58a58b5fad5c27bac2c01f67960f57ffc7cfcc53803024910d40c062f1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}