{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "463721",
    "entityType": "User",
    "nonce": "0xde5cef609a17be540fed00f1e1755ab76efb4e4702eaa512a4faa3574889d116",
    "signature": "0xd2babc6124414e53c725c9c946b34a51296f86869393e0fe431d0457fce2eb277a32c88a2a636f651ec371eed97236564ec6c52c1077476743735614a0648db11b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}