{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1408030",
    "entityType": "User",
    "nonce": "0x1a494bd85112fd8e5985f97a3e2c221f01a22e23e5331adb14450b5fc0931758",
    "signature": "0x61f0f93a341fc59156ea9340d9d1a1d1ec1e28603e8a6da17f380544a7f0428b12c2ab2616feea69e4e4c7bb6a54ea8d7dd819451f4f8c274f57ba0a2c61ed111c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}