{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "507170227",
    "entityType": "User",
    "nonce": "0x9a6865caff84f49838e5c430f8ccfd929409ba8992dfdd0ef56aa606ee853377",
    "signature": "0xec47c59ae4007209c74567f4d6f332d36f0c78d3131ca14aab9b3694c247ac805a6e2745497047a0697d2bb618b0adbb8e722f8e2d278177194dd405a465a7b11b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}